#include<stdio.h>
#include<math.h>
int main()
{
int x1,y1,x2,y2;
while(scanf("%d %d %d %d",&x1,&y1,&x2,&y2)!=EOF)
printf("%.2f\n",sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)));
return 0;
}
【数学函数】
#include<stdio.h>
#include<math.h>
int main()
{
int x1,y1,x2,y2;
while(scanf("%d %d %d %d",&x1,&y1,&x2,&y2)!=EOF)
printf("%.2f\n",sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)));
return 0;
}
【数学函数】