Difference in variable value inside and outside a function

Question

I wrote a program in which I found the area of cylinder using a functionarea with a return-type and without parameters. answerwas returned to main function. However, I am getting different output in main and a different output in area. The decimal places seem to be replaced by 0 in the main function. Why is it so?

Answer 1

Change the return type of area from int to float

Answer 2

Your function returns an int which truncates any real part of the value.

float area()

Answer 3

Your variable answer is float in area function but return type of area function is int. so it typed cased during return, in main

int area(){
 ^  should be float

 float answer;

 // print float
 return answer;
}

int main(){
 answer = area(); // answer gets integral part
 // print int part
}