C - Functions - Discussion

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Q.

What is the output of this program?

#include
using namespace std;
void fun(int x, int y)
{
x = 20;
y = 10;
}
int main()
{
int x = 10;
fun(x, x);
cout << x;
return 0;
}
A. 10 B. 20
C. compile time error D. none of the mentioned

Answer: Option A
Explaination:

In this program, we called by value so the value will not be changed, So the output is 10.


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