#include <stdio.h> #include <string.h> #include <math.h> #define N 100 int main() { float a, b, c,p, s; while (scanf("%f%f%f", &a, &b, &c)!=EOF) { p = (a + b + c)/2; s = sqrt(p * (p - a) * (p - b) * (p - c)); printf("%.2f",s); } return 0; } |
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