B

来源:互联网 发布:mysql constraint 编辑:程序博客网 时间:2024/05/02 02:06
#include<stdio.h>#include<math.h>int main(){float x1,y1,x2,y2,s;while(scanf("%f%f%f%f",&x1,&y1,&x2,&y2)!=EOF){s=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));printf("%.2f\n",s);}return 0;}
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