Question

/*【问题描述】要求定义和调用函数dist(x1,y1,x2,y2)计算两点 间的距离｡

Answer 1

/*来试一试下面的.dist函数的类型应定义成double型,不能是int型.*/

#include

#include

double dist(double x1,double x2,double y1,double y2)

{

x09double distance;

x09x09distance=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));

x09x09return distance;

x09}

int main(void)

x09{

x09x09double x1,x2,y1,y2,distance;

x09x09x09printf("Input(x1,y1):");

x09x09x09scanf("%lf %lf",&x1,&y1);

x09x09x09printf("Input(x2,y2):");

x09x09x09scanf("%lf %lf",&x2,&y2);

x09x09x09distance=dist(x1,x2,y1,y2);

x09x09x09printf("distance=%.2f,%fn",distance,a);

x09x09x09return 0;

x09x09}