方法一:
注意:结构体初始化是两种方法。
#include <stdio.h>
#include <math.h>
struct point
{
float x; //x axis
float y; //y axis
};
int main(void)
{
float x,y;
struct point p;
struct point p2 = {1.5,2.5}; //结构体初始化
float distance;
float dx,dy;
//p = p2; //结构体赋值
printf("demo struct\n");
scanf("%f %f",&p.x,&p.y);
printf("p.x = %.1f,p.y = %.2f\n",p.x,p.y);
dx = p.x - p2.x; //x 差值
dy = p.y - p2.y; //y 差值
distance = sqrt(dx * dx + dy * dy);
printf("distance = %f\n",distance);
#if 0
printf("sizeof struct point = %d\n",sizeof(struct point));
printf("sizeof float = %d\n",sizeof(float));
printf("sizeof double = %d\n",sizeof(double));
#endif
return 0;
}