解题思路:
注意事项:
参考代码:
#include<stdio.h> #include<math.h> double ys(double x1,double y1,double x2,double y2){ double k=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2); return sqrt(k);} int main() { double x1,y1,x2,y2; while(scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2)!=EOF) printf("%.2lf\n",ys(x1,y1,x2,y2)); return 0; }
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