#include <stdio.h>
#include <stdlib.h>
#include <math.h>

float opt()
{
    float s, area;
    float a, b, c;
    printf("Enter the sides of the triangle: \n");
    printf("a = ");
    scanf("%f", &a);
    printf("b = ");
    scanf("%f", &b);
    printf("c = ");
    scanf("%f", &c);
    s = ((a + b + c) / 2);
    area = sqrt(s * (s - a) * (s - b) * (s - c));
    printf("Area of the triangle is:  %f", area);
}

float main()
{
    system("cls");
    opt();
    return 0;
}
//.......Coded by JAIDEEP JAMBLE