题解 | #计算三角形的周长和面积#
计算三角形的周长和面积
https://www.nowcoder.com/practice/109a44d649a142d483314e8a57e2c710
#include <stdio.h>
#include<math.h>
int main()
{
float a, b, c;
double circumference, area, jungle;
scanf("%f %f %f", &a, &b, &c);
circumference = a + b + c;
jungle = (a * a + c * c - b * b) / (2 * a * c);
area = 0.5 * c * a * sqrt(1 - jungle * jungle);
printf("circumference=%.2lf area=%.2lf", circumference, area);
return 0;
}
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