View Code of Problem 24

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

int main(){

	/*
	输入三角形的边长a,b,c,求三角形的面积S。
	*/
	int a , b , c;
	while( scanf("%d %d %d" , &a , &b , &c) != EOF ){
		float p = ( a + b +c )/2.0;
		float s = sqrt(  p * ( p - a ) * ( p - b ) * ( p - c )  );
		printf("%.2f\n" , s);
	}
	

	return 0;
}	

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