Can any one tells me why answer is not correct?

Question

#include <iostream>
using namespace std;

int main()
{
int a;
int b;
int sum = a + b;

cout << "Please enter a value \n";

cin >> a;

cout << "Please enter b value \n";

cin >> b;

cout << sum;

return 0;
}

Answer 1

The expression
int sum=a+b; is invalid

Answer 2

https://code.sololearn.com/cw2bcD6oQOXT/#cpp

^There you go.

It doesn't work because you declared sum as "int sum = a + b;" before you even received the input for a & b variables. So, instead you'll want to declare sum as "int sum;" and then AFTER you obtain the input values for a & b, assign "sum = a + b;" before you print output for sum.

Hope that helps.

int main()
{
int a;
int b;
int sum;

cout << "Please enter a value \n";
cin >> a;

cout << "Please enter b value \n";
cin >> b;

sum = a + b;
cout << sum;

return 0;
}

Answer 3

your sum variable should after last cin

Answer 4

🙂🙂