Question

I am trying to get area of circle using my program. But area is not coming in decimals.

#include<iostream>

using namespace std;


float AreaOfCircle(float r);
int AreaOfCircle(int r);

int main()
{int rad;
    cout<<"Enter the Radius of Crircle: ";
    cin>>rad;
    cout<<"The Are of the Cirlcle: "<<AreaOfCircle(rad);

}
float AreaOfCircle(float r)
{
    int area=0;
    area=2*3.1456*r*r;
    return area;
}

int AreaOfCircle(int r)
{
    int area=0;
    area=2*3.1456*r*r;
    return area;
}

But I need answer to some decimal point.

Answer 1

You’re not calling the float version of the method.

Either declare your variable as float

float rad;

or cast it to float before you call the method.

AreaOfCircle((float)rad);

You also need to use float instead of int inside the overloaded method:

float AreaOfCircle(float r)
{
    float area=0;   // <--- float here
    area=2*3.1456*r*r;
    return area;
}

Also:

area = pi * r * r
length = 2 * pi * r
pi ~= 3.1415