#import <objc/objc.h>
#import <objc/Object.h>
#import <Foundation/Foundation.h>
 
@implementation TestObj
int main()
{
	// your code goes here
	return 0;
}
@end

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#include <stdio.h>

int main() {
    double x, y, z;
    printf("请输入第一条边的长度：");
    scanf("%lf", &x);
    printf("请输入第二条边的长度：");
    scanf("%lf", &y);
    printf("请输入第三条边的长度：");
    scanf("%lf", &z);

    if ((x + y > z) && (x + z > y) && (y + z > x)) {
        printf("可以构成三角形。\n");
    } else {
        printf("不能构成三角形。\n");
    }

    return 0;
}