FUNCTIONS WITHOUT ARGUMENTS & WITH RETURN TYPE

PROGRAM:

#include<stdio.h>

#include<math.h> float area()

{

int a,b,c; float s,ar;

printf("Enter 3 Sides\n"); scanf("%d%d%d",&a,&b,&c); s=(a+b+c)/2; ar=sqrt(s*(s-a)*(s-b)*(s-c)); return ar;

}

main()

{

float a; a=area();

printf("The Area of Triangle is %f\n",a);

}

OUTPUT:

Enter 3 Sides 12 8 7

The Area of Triangle is 19.748418