Distance_between_two_points.c

#include<stdio.h>
#include<math.h>
int main(){
    int x1,y1,x2,y2;
    float dis;
    scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
    dis=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
    printf("%0.4f",dis);
}