#include <stdio.h>
#include <math.h>
#include <stdlib.h>
double TriangleArea(double a, double b, double c);
int main(int argc, const char * argv[]) {
printf("%f\n", TriangleArea(atof(argv[1]), atof(argv[2]), atof(argv[3])));
return 0;
}
double TriangleArea(double a, double b, double c){
double area, p;
p = (a + b + c) / 2;
area = sqrt(p * (p - a) * (p - b) * (p - c));
return area;
}
如何使用:
./tranglearea 3 4 5
6.000000
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