Which one is correct? a=PI*pow(r,2) or a=PI*pow(r,2); where #define PI 3.14

Answer 1

#define PI 3.1415

int main() {
int r = 2;
double a = PI * pow(r, 2);
std::cout << a; // output : ~ 12.5664
}

Answer 2

Absolutely Serjeel.

Answer 3

a semicolon is required right?