前排,,,不要把节操掉地上啊,没有扫地阿姨在啊, #include<stdio.h>
#include<math.h>
int main(void)
{
double a,b,c;
double x,y,s;
printf("Enter 3 sides of triangle:");
scanf("%lf%lf%lf",&a,&b,&c);
if(a+b>c||b+c>a||a+c>b){
s=(a+b+c)/2;
x=sqrt(s*(s-a)*(s-b)*(s-c));
y=a+b+c;
printf("x=%.2f;y=%0.2f\n",x,y);
}
else{
printf("this is a bad");
}
return 0;
}