[ECP 1016] Simple loop

#include <stdio.h>

int main(){

    int x,y,z;

    while(1){
        printf("Enter the lengths of three sides of a triangle:\t");
        scanf("%d %d %d",&x,&y,&z);

        if(x>0&&y>0&&z>0){

            if((x==y) && (y==z)){
                printf("The triangle is equilateral\t");
            }
            else if((x==z) || (y==z) || (x==y)){
                printf("The triangle is isoseles\t");
            }
            else{
                printf("The triangle is scalene\t");
            }
            break;
        }

        else{
            printf("Cannot enter '-' or zero la!\n");
        }
    }
    return 0;
}