神不会流血，但是你会 #include using namespace std; int main() { double a,b,c; scanf("%lf%lf%lf",&a,&b,&c); double p=(a+b+c)/2; printf("%.2lf",sqrt(p*(p-a)(p-b)(p-c))); return 0; } #include #include using namespace std; int main() { double x1,y1,x2,y2,x3,y3; scanf("%lf%lf%lf%lf%lf%lf",&x1,&y1,&x2,&y2,&x3,&y3); double a,b,c; a=sqrt((x2-x1)(x2-x1)+(y2-y1)(y2-y1)); b=sqrt((x3-x1)(x3-x1)+(y3-y1)(y3-y1)); c=sqrt((x3-x2)(x3-x2)+(y3-y2)(y3-y2)); printf("%.2lf",a+b+c); return 0; } loic Praetox.com chrome://dino/ 祄膍砿莔蕀衜縨謒瞞續癿適韒蚼琺萴賛羗﹎瞞籱蟤觤續踡詍眒穖筸籱筸觤衜蚼秏萴雖糾鄊觤黰砿鰉萴雖觤趍絤駇膍