算法训练——斜率计算

//斜率计算
#include<stdio.h>
int main(){
	int x1,x2,y1,y2,k;
	scanf("%d%d
%d%d",&x1,&y1,&x2,&y2);
	if(x2-x1 == 0)
		printf("INF");
	else{	
		k = (y2-y1)/(x2-x1);
		printf("%d",k);
	} 
	return 0;
}