2

`#include <stdio.h>

include <stdlib.h>

int main(){
float a,b,c;
while(scanf("%f%f%f",&a,&b,&c)!=EOF){
if(a<b+c && b<a+c && c<a+b)
printf("能构成三角形\n");
else
printf("不能构成三角形\n");
}
system("pause");
return 0;
} `