Question

#include<iostream>

using namespace std;

void calcSumAndDiff(int ,int, int &, int &);

void calcSumAndDiff(int n1,int n2, int &sum, int &diff){

sum = n1 + n2;

diff = n1 - n2;

}

int main()

{

int n1,n2,sum,diff;

n1=30;n2=10;

calcSumAndDiff(n1,n2,sum,diff);

cout<<"Sum is :"<<sum<<endl;
cout<<"Diff is:"<<diff<<endl;

system("pause");

}

Answer 1

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C++ Code:

// If we include #include<bits/stdc++.h> we don't want to include any header files
#include<iostream>
// system() is used to invoke an operating system command from a C/C++ program
#include<stdlib.h>
using namespace std;
void calcSumAndDiff(int ,int, int &, int &); // It is no need to declare because here we instalise
// here we instalise the function
void calcSumAndDiff(int n1,int n2, int &sum, int &diff)
{
   sum = n1 + n2;  
   diff = n1 - n2;
}
// Main function
int main()
{
   int n1,n2,sum,diff;
   // instalise the n1 and n2 values as 30 and 10 respectively
   n1=30;n2=10;
   // Calling method calcSumAndDiff with parameters
   calcSumAndDiff(n1,n2,sum,diff);
   // Display the sum value after calling the function
   cout<<"Sum is :"<<sum <<endl;
   // Display the diff value after calling the function
   cout<<"Diff is:"<<diff <<endl;
   //system(“pause”) which is used to execute pause command and make the screen/terminal
   //wait for a key press, and system(“cls”) which is used to make the screen/terminal clear.
   system("pause");
   return 0;
}