loops

Topics:

Number between 1 and 100

#include<iostream>
    using namespace std;
    int main()
    {
        int num_1;
        while(num1!=101)
        {
            cout<<num1<<" "<<endl;
            num1++;
        }
        return 0;

    }

Make a program that asks for a test score between zero and ten. Show a message if the value is invalid and keep asking until the user enters a valid value

// task-01
#include <iostream>
using namespace std;
int main()
{
    int input;
    cout << "Enter the test score between 1 and 10:" << endl;
    cin >> input;
    while (input < 0 || input > 10)
    {
        cout << "INVALID INPUT:!" << endl;
        cout << "Again Enter the test score between 1 nd 10: " << endl;
        cin >> input;
    }

    return 0;
}

Square

#include <iostream>
    using namespace std;
    int main()
    {
        cout << "How many stars to print: as square ";
        int howMany;
        cin >> howMany;
        cout << "Following are " << howMany << " stars" << endl;
        int i=1;
        while(i<=howMany)
        {
            int j=1;
            while(j<=howMany)
            {
                cout<<"*";
                j++;
            }
            cout<<endl;
        i++;
        }
        cout << endl;

        return 0;
    }

Right triangle

_________________________________________________________________
      How many stars to print: as a triangle 7
     Following are 7 stars
     *
     **
     ***
     ****
     *****
     ******
     *******
      #include <iostream>
          using namespace std;
          int main()
          {
              cout << "How many stars to print: as a triangle ";
              int howMany;
              cin >> howMany;
              cout << "Following are " << howMany << " stars" << endl;
              int i=1;
              while(i<=howMany)
              {
                  int j=1;
                  while(j<=i)
                  {
                      cout<<"*";
                      j++;
                  }
                  cout<<endl;
              i++;
              }
              cout << endl;

              return 0;
          }

output as:
___________________________________________________________________
Shadow of revtangle:
How many stars to print: as a triangle 6
Following are 6 stars
******
*****
****
***
**
*
#include <iostream>
    using namespace std;
    int main()
    {
        cout << "How many stars to print: as a triangle ";
        int howMany;
        cin >> howMany;
        cout << "Following are " << howMany << " stars" << endl;
        int i = howMany;
        while (i >= 1)
        {
            int j = 1;
            while (j <= i)
            {
                cout << "*";
                j++;
            }
            cout << endl;
            i--;
        }
        cout << endl;

        return 0;
    }
___________________________________________________________________________
Horizontal Image of triangle
How many stars to print: as a triangle 7
Following are 7 stars
*******
 ******
  *****
   ****
    ***
     **
      *
      #include <iostream>
        using namespace std;
        int main()
        {
            cout << "How many stars to print: as a triangle ";
            int howMany;
            cin >> howMany;
            cout << "Following are " << howMany << " stars" << endl;
            int i = 0;
            while (i < howMany)
            {
                int j = 1;
                while (j <= howMany)
                {
                    if (j <= i)
                    {
                        cout << " ";
                    }
                    else
                    {
                        cout << "*";
                    }
                    j++;
                }
                cout << endl;
                i++;
            }
            cout << endl;

            return 0;
        }
       ___________________________________________________________________________

Pyramids

Output as:
Enter a number :
7
       *
      ***
     *****
    *******
   *********
  ***********
 *************
 _____________________________________________________
 #include<iostream>
    using namespace std;
    int main()
    {
        int n;
        cout<<"Enter a number :"<<endl;
        cin>>n;
        int i=0;
        while(i<n)
        {
            int j=0;
            while(j<=2*n)
        {
            if(j==n || (j>=(n-i) && j<=(n+i)))
            {
                cout<<"*";
            }
            else
            {
                cout<<" ";
            }
            j++;
        }
        cout<<endl;
            i++;
    }
        return 0;
    }

Write a program that takes multiple inputs from user until a user enter a negative number. When a negative number is pressed. Program should be terminated and the sum of all positive integars should be displayed to user.

#include <iostream>
    using namespace std;
    int main()
    {
        int num;
        int sum = 0;
        while (num >= 0)
        {
            cout << "Enter a number :" << endl;
            cin >> num;
            if (num >= 0)
            {
                sum = sum + num;
            }
        }
        cout << "The sum of all the above positive numbers = " << sum << endl;

        return 0;
    }

Write a program to add, subtract, multiply and divide using switch case.

#include <iostream>
    #include <conio.h>
    using namespace std;
    int main()
    {
        double num1;
        double num2;
        double cal;
        cout << "_______________________________________" << endl;
        cout << "----------Simple Calculator------------" << endl;
        cout << "_______________________________________" << endl;
        cout << endl;
        cout << "Enter a number 1 :" << endl;
        cin >> num1;
        cout << "Enter a number 2 :" << endl;
        cin >> num2;
        cout << "Press + to add the enter Numbers :" << endl;
        cout << "Press - to subtract the enter Numbers :" << endl;
        cout << "Press * to Multiply the enter Numbers :" << endl;
        cout << "Press / to divide the enter Numbers :" << endl;
        char ch = getch();
        switch (ch)
        {
        case '+':
        {
            cal = num1 + num2;
            cout << "The addition of the " << num1 << " and " << num2 << " = " << cal << endl;
            break;
        }
        case '-':
        {
            cal = num1 - num2;
            cout << "The subtarction of the " << num1 << " and " << num2 << " = " << cal << endl;
            break;
        }
        case '*':
        {
            cal = num1 * num2;
            cout << "The multiplication of the " << num1 << " and " << num2 << " = " << cal << endl;
            break;
        }
        case '/':
        {
            cal = num1 / num2;
            cout << "The division of the " << num1 << " and " << num2 << " = " << cal << endl;
            break;
        }
        }

        return 0;
    }

Write a program which counts number of vowels in a given string and tell every index where a vowel is found. You must have to perform this task using while loop and switch cases. (10 marks) Hint: Use String manipulations concepts here to get value from user and to initialize size.

#include <iostream>
    using namespace std;
    int main()
    {
        int size = 100;
        char ch[size];
        cout << "Enter the string :" << endl;
        cin.getline(ch, size);
        int n = 0;
        int i = 0;
        while (ch[i] != '\0')
        {
            switch (ch[i])
            {
            case 'a':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'e':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'i':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'o':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'u':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }

            case 'A':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'E':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'I':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'O':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            case 'U':
            {
                cout << "The vowel " << ch[i] << " is present at " << i << " index ." << endl;
                n++;
                break;
            }
            }

            i++;
        }
        cout<<"The total vowels in the string \""<<ch<<"\" = "<<n<<endl;

        return 0;
    }

TAble of 10

#include <iostream>
    using namespace std;
    int main()
    {
        int table;
        int n = 1;
        cout<<"Table of 10 "<<endl;
        while (n != 11)
        {
            table = 10 * n;
            cout << "10"
                 << " * " << n << " = " << table << endl;
            n++;
        }

        return 0;
    }

For the Pyramid

#include<iostream>
         using namespace std;
         int main()
         {
            int num;
            cout<<"Enter a number:"<<endl;
            cin>>num;
            for(int i=0;i<num;i++){
                for(int j=1;j<(2*num);j++){
                     if(j<=num+i && j>=num-i){
                         cout<<"*";
                     }
                     else{
                         cout<<" ";
                     }
                }
                cout<<endl;
            }

             return 0;
         }
         OUTPUT AS:
         Enter a number:
         10
         *
        ***
       *****
      *******
     *********
    ***********
   *************
  ***************
 *****************
*******************

DIMAOND

#include<iostream>
         using namespace std;
         int main()
         {
            int num;
            cout<<"Enter a number:"<<endl;
            cin>>num;
            for(int i=0;i<num;i++){
                for(int j=1;j<(2*num);j++){
                     if(j<=num+i && j>=num-i){
                         cout<<"*";
                     }
                     else{
                         cout<<" ";
                     }
                }
                cout<<endl;
            }

            for(int i=num-2;i>=0;i--){
                for(int j=1;j<(2*num);j++){
                     if(j<=num+i && j>=num-i){
                         cout<<"*";
                     }
                     else{
                         cout<<" ";
                     }
                }
                cout<<endl;
            }


             return 0;
         }

         OUTPUT AS:
         Enter a number:
         10
         *
        ***
       *****
      *******
     *********
    ***********
   *************
  ***************
 *****************
*******************
 *****************
  ***************
   *************
    ***********
     *********
      *******
       *****
        ***
         *

Hollow DIAMOND

#include<iostream>
        using namespace std;
        int main()
        {

           int num;
           cout<<"Enter a number:"<<endl;
           cin>>num;
           for(int i=0;i<num;i++){
               for(int j=1;j<(2*num);j++){
                    if(j==num+i || j==num-i){
                        cout<<"*";
                    }
                    else{
                        cout<<" ";
                    }
               }
               cout<<endl;
           }
           for(int i=num-2;i>=0;i--){
               for(int j=1;j<(2*num);j++){
                    if(j==num-i || j==num+i){
                        cout<<"*";
                    }
                    else{
                        cout<<" ";
                    }
               }
               cout<<endl;
           }
            return 0;
        }
        Enter a number:
        10
        *
        * *
       *   *
      *     *
     *       *
    *         *
   *           *
  *             *
 *               *
*                 *
 *               *
  *             *
   *           *
    *         *
     *       *
      *     *
       *   *
        * *
         *

ARROW

#include<iostream>
         using namespace std;
         int main()
         {
            int num;
            cout<<"Enter a number:"<<endl;
            cin>>num;
            for(int i=0;i<num;i++){
                for(int j=1;j<(2*num);j++){
                     if(j==num|| (j==num+i || j==num-i)){
                         cout<<"*";
                     }
                     else{
                         cout<<" ";
                     }
                }
                cout<<endl;
            }
            for(int i=num-1;i>=0;i--){
                for(int j=1;j<(2*num);j++){
                     if(j==num){
                         cout<<"*";
                     }
                     else{
                         cout<<" ";
                     }
                }
                cout<<endl;
            }
             return 0;
         }
         Enter a number:
         10
         *
        ***
       * * *
      *  *  *
     *   *   *
    *    *    *
   *     *     *
  *      *      *
 *       *       *
*        *        *
         *
         *
         *
         *
         *
         *
         *
         *
         *
         *

PRINT PATTERN BE LIKE AS:

Enter a number:
10
********* *********
********   ********
*******     *******
******       ******
*****         *****
****           ****
***             ***
**               **
*                 *

*                 *
**               **
***             ***
****           ****
*****         *****
******       ******
*******     *******
********   ********
********* *********


#include<iostream>
    using namespace std;
    int main()
    {
       int num;
       cout<<"Enter a number:"<<endl;
       cin>>num;
       for(int i=0;i<num;i++){
           for(int j=1;j<(2*num);j++){
                if(j<=num+i && j>=num-i){
                    cout<<" ";
                }
                else{
                    cout<<"*";
                }
           }
           if(i==num-1){
               break;
           }
           cout<<endl;
       }
       for(int i=num-1;i>=0;i--){
           for(int j=1;j<(2*num);j++){
                if(j<=num+i && j>=num-i){
                    cout<<" ";
                }
                else{
                    cout<<"*";
                }
           }
           cout<<endl;
       }
        return 0;
    }

HAlf DIAMOND

#include <iostream>
    using namespace std;
    int main()
    {
        int num;
        cout << "Enter the  number:" << endl;
        cin >> num;
        for (int i = 1; i <= num; i++)
        {
            for (int j = 0; j < i; j++)
            {
                cout << "*";
            }
            cout << endl;
        }
        for (int i = num - 1; i > 0; i--)
        {
            for (int j = 0; j < i; j++)
            {
                cout << "*";
            }
            cout << endl;
        }

        return 0;
    }

    out put as:
    Enter the  number:
    10
    *
    **
    ***
    ****
    *****
    ******
    *******
    ********
    *********
    **********
    *********
    ********
    *******
    ******
    *****
    ****
    ***
    **
    *

Computer Guess game

#include <iostream>
    #include <cstdlib>
    #include <ctime>
    using namespace std;
    int main()
    {
        int x = time(0);
        srand(x);
        int compGuess;
        int userGuess;
        bool flag = false;
        cout << "The computer Enter the number " << endl;
        cout << "Now you guess the number that computer enter" << endl;
        compGuess = (rand() % 10) + 1;
        // cout<<compGuess;
        cout << "You have only three trials" << endl;
        for (int i = 1; i <= 3; i++)
        {
            cout << i << " try:" << endl;
            cin >> userGuess;
            if (userGuess == compGuess)
            {
                flag = true;
                break;
            }
            else if ((compGuess - userGuess <= 2 && compGuess - userGuess >= 1) || (compGuess - userGuess >= -2 && compGuess - userGuess <= -1))
            {
                if (i <= 2)
                {
                    cout << "You are very close to the number:" << endl;
                }
            }
            else
            {
                if (i <= 2)
                {
                    cout << "You are not close to the number:" << endl;
                }
            }
        }
        if (flag == false)
        {
            cout << "You lose the game!" << endl;
            cout << "The number enter by the computer is equal to the " << compGuess << endl;
        }
        if (flag == true)
        {
            cout << "You win the game!" << endl;
            cout << "The number enter by the computer is equal to the " << compGuess << endl;
        }

        return 0;
    }

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