Question

编写C语言程序,输入a,b,c三个数,分别用它们作为三条边,判断能否构成三角形并输出相应信息

构成三角形的条件是:任意两边之和大于第三边

Answer 1

#include <stdio.h>
void main()
{
int a,b,c;
puts("please input three integers:");
scanf("%d %d %d",&a,&b,&c);
if(a+b<c)
{
printf("sorry!the three integers can't constitute a triangle!\nBecause %d+%d<%d\n",a,b,c);
return;
}
if(c+b<a)
{
printf("sorry!the three integers can't constitute a triangle!\nBecause %d+%d<%d\n",c,b,a);
return;
}
if(a+c<b)
{
printf("sorry!the three integers can't constitute a triangle!\nBecause %d+%d<%d\n",a,c,b);
return;
}
puts("the three integers can constitute a triangle!");
}

Answer 2

#include<stdio.h>
void main()
{
float a,b,c;
scanf("%f,%f,%f\n",&a,&b,&c);
if(a+b>c&&b+c>a&&a+c>b)
printf("ok\n");
else
printf("can't\n");
}