问题一百三十七：计算坐标上两点之间的距离

#include <stdio.h>

#include <stdlib.h>

#include <math.h>



float distance(int a, int b, int c, int d);



int main(int argc, char *argv[])

{

      int a;

      int b;

      int c;

      int d;

      

      printf("Please enter the first coordinate points x:");     //输入第一个点 

      scanf("%d %d", &a, &b);

      printf("Please enter the second coordinate points y:");    //输入第二个点

      scanf("%d %d", &c, &d);

      

      printf("The distance between two points is %f\n", distance(a, b, c, d));

      

      system("PAUSE");	

      return 0;

}



// Calculate distances



float distance(int a, int b, int c, int d)     //计算两点的距离 

{

      int   x;

      int   y;

      float distance;

      

      x=abs(a-c);

      y=abs(b-d);

      distance=sqrt(x*x+ y*y);     

      

      return distance;

}