C语言基础:结构体及指针使用演示
#include <stdio.h> struct Shape { int type; int color; float radius; float area; float perimeter; }; void change_structure(struct Shape *shape) { shape->type = 0; shape->color = 1; shape->radius = 5.0; shape->area = 22.0 / 7.0 * shape->radius * shape->radius; shape->perimeter = 2.0 * 22.0 / 7.0 * shape->radius; } int main(void) { struct Shape circle; change_structure(&circle); printf("circle.type %d\n", circle.type); printf("circle.color %d\n", circle.color); printf("circle.radius %f circle.area %f circle.perimeter %f\n", circle.radius, circle.area, circle.perimeter); return 1; }
输出结果
circle.type 0 circle.color 1 circle.radius 5.000000 circle.area 78.571426 circle.perimeter 31.428572