#include <stdio.h> #include <math.h> int main() { int a, b ,c ; while (scanf("%d %d %d", &a, &b,&c) != EOF) { // 注意 while 处理多个 case // 64 位输出请用 printf("%lld") to float p=(a + b + c)/2.0; printf("circumference=%.2f area=%.2f",(a+b+c)+0.0, sqrt(p*(...