定义一结构体变量，用其表示点坐标，并输入两点坐标，求两点之间的距离
解：#include
#include
struct point
{
float x;
float y;
};
main()
{ float dis;
struct point pt1,pt2;
printf(“input point1.x:”);
scanf(“%f”,&pt1.x);
printf(“input point1.y:”);
scanf(“%f”,&pt1.y);
printf(“input point2.x:”);
scanf(“%f”,&pt2.x);
printf(“input point2.y:”);
scanf(“%f”,&pt2.y);
dis=sqrt((pt1.x-pt2.x)*(pt1.x-pt2.x)+(pt1.y-pt2.y)*(pt1.y-pt2.y));
printf(“The distance of the two points is:%f”,dis);
}