补充(1)(2)。急用~~~
#include"math.h"
#include"stdio.h"
main()
{float a,b,c,d,t,s;
printf(请输入三角形的三条边:”);
scanf("%f,%f,%f",&a,&b,&c);
if_____________(1)
printf("%f%f%f 不能够成三角形!",a,b,c);
else {t=(a+b+c)/2;
s=___________________________(2)
printf("a=%7.2f,b=%7.2f,c=%7.2f,area=%7.2f\n",a,b,c,s);}}