C++ programming

Example 1:

//  Created by Nityasha on 16/08/20.

//  Copyright © 2020 nityasha. All rights reserved.

//

// Program to calculate circumference of circle

// formula : circumference of circle = 2 x PI x Radius

#include <iostream>

#include <math.h>

using namespace std;

int main(int argc, const char * argv[])

{

    const float pi = 3.14;

    float circumference ;

    int radius =2;

     circumference =2* M_PI *radius;

    cout<<"correct upto two decimal places ="<<circumference<<"\n";

    circumference =2* M_PI *radius;

    cout<<"correct value using math library constant M_PI ="<<circumference<<"\n";

  

   return 0;

}

Example 2

cin, cout program

#include <iostream>

#include <stdlib.h>

#include <math.h>

using namespace std;

int main(int argc, const char * argv[])

{

    string name[38];

    int marks[38];

    for (int i=1; i<=3; i++)

    {

        cout<<"enter name of student "<<i<<"\n";

        cin>>name[i];

        cout<<"enter marks";

        cin >>marks[i];

    }

    for (int i=1; i<=3; i++)

    {

        cout<<"\n=============student"<<i<<"==============\n";

        cout<<"student"<<i<<"name: "<<name[i]<<"\n";

        cout<<"marks of "<<name[i]<<": "<<marks[i]<<"\n";

    }

    return 0;

}