TOJ 2746: Classifying Triangles
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2746: Classifying Triangles
描述
A triangle can be described by the lengths of its three sides. However, any given three lengths will not necessarily describe a triangle. In this problem, you must determine the type of triangle, given three side lengths.
输入
The first line of input will contain a positive integer T < 1000, where T denotes the number of test cases. Each of the next T lines will contain three positive integers. Each integer will be less than 10^9.
输出
For each case of the input there will be one line of output. It will be formatted as:
Case #{x}: {triangle type}
where x denotes the case number being processed and {triangle type} is the type of the triangle. {triangle type} will be one of the following, depending on the values of the three sides:
Invalid - The three sides cannot form a triangle
Equilateral - All three sides of valid triangle are equal
Isosceles - Exactly two of the sides of a valid triangle are equal
Scalene - No pair of sides are equal in a valid triangle.
样例输入
5
1 2 5
1 1 1
4 4 2
3 4 5
1 1 2
样例输出
Case 1: Invalid
Case 2: Equilateral
Case 3: Isosceles
Case 4: Scalene
Case 5: Invalid
#include <stdio.h>
int main()
{
int n,i,a,b,c;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%d%d%d",&a,&b,&c);
if((a+b<=c)||(a+c<=b)||(b+c<=a)||(a<0)||(b<0)||(c<0))
printf("Case %d: Invalid\n",i+1);
else
{
if(a==b&&b==c)
printf("Case %d: Equilateral\n",i+1);
else if(a==b||b==c||a==c)
printf("Case %d: Isosceles\n",i+1);
else
printf("Case %d: Scalene\n",i+1);
}
}
return 0;
}
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