please tell me any mistake #include<iostream> int main() { int a,b; int sum = a+b; cout<<"value of a"<<endl; cin>>a; cout<<"value of b"<<endl; cin>>b; cout<< sum<<endl; return 0; } //if i simply write a+b in place of sum only then it works other wise it shows sum huge number

Question

just look at the code

Answer 1

#include<iostream>
using namespace std;

int main() {
int a,b;

cout<<"value of a = "; cin>>a;
cout<<"value of b = "; cin>>b;

int sum = a + b;
cout<< sum<<endl;
}

Answer 2

Common mistake for beginners. I remember doing this as well. When you declare sum, you initialized it with the sum of a and b. At this point in the program, the values of a and b are undefined, because your cin statements come after the assignment of a + b to sum.

int a, b, sum;

cin >> a;
cin >> b;
// at this point, values a and b are already provided by the user.
sum = a + b;

Answer 3

Hahha you should to be fine in maths ;-)

Answer 4

Iostream.h