结构体基本使用
- 如果有typedef定义结构体,那么后面跟着的单词是类型的别名
- 没有typedef,定义结构体,后面跟着的单词是一个结构体变量
结构体数组
代码示例:
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
typedef struct Person
{
char name[64];
int age;
}myPerson;
void test01()
{
myPerson p= {
"aa", 10 };
}
struct Person2
{
char name[64];
int age;
}myPerson2 = {
"bbb",200};
void test02()
{
printf("姓名:%s年龄:%d\n",myPerson2.name,myPerson2.age);
myPerson2.age = 100;
strcpy(myPerson2.name,"aaa");
printf("姓名:%s年龄:%d\n", myPerson2.name, myPerson2.age);
}
struct
{
char name[64];
int age;
}myPerson3 = {
"ccc",30};
void test03()
{
printf("姓名:%s 年龄:%d\n",myPerson3.name,myPerson3.age);
}
void test04()
{
struct Person p1 = {
"aaa",10};
struct Person*p2=malloc(sizeof(struct Person));
p2->age = 100;
strcpy(p2->name,"bbb");
}
void printArray(struct Person person[], int len)
{
for(int i=0;i<len;i++)
{
printf("姓名:%s 年龄:%d\n",person[i].name,person[i].age);
}
}
void test05()
{
struct Person person[] =
{
{
"aaa",10},
{
"bbb",20},
{
"ccc",30},
{
"ddd",40},
};
struct Person*personArr = malloc(sizeof(struct Person) * 4);
for (int i = 0; i < 4; i++)
{
sprintf(personArr[i].name,"name_%d",i);
personArr[i].age = i + 18;
}
printArray(personArr, 4);
if (personArr != NULL)
{
free(personArr);
personArr = NULL;
}
}
int main()
{
test05();
return EXIT_SUCCESS;
}