PI IN C++ WITH CMATH

#include <iostream>
#include <cmath>
using namespace std;
float area(int radius) {
   return M_PI * (radius * radius);
}
int main () {
   cout << "Area of a circle with radius 7 unit is: " << area(7);
}

Source: tutorialspoint.com

Similar codes

18 votes284 views5 answers
C++ random number
C++
1 vote268 views1 answer
How to writt array in c++
C++
0 vote273 views1 answer
How to show constellations in starry night orion special edition
C++
0 vote314 views1 answer
Qt file explorer
C++
1 vote277 views1 answer
Char type casting in c++
C++
1 vote297 views1 answer
Ifstream relative file path
C++
0 vote246 views1 answer
1ll
C++
10 votes333 views3 answers
C++ check if file exits
C++
23 votes279 views1 answer
How to declare a function in c++
C++
0 vote299 views1 answer
Google test assert exception
C++