c語言結構體指針數組怎么初始化

在C語言中，結構體指針數組的初始化可以通過以下幾種方式進行：

1. 逐個初始化：通過逐個為每個元素賦值。例如：

struct Person {
    char name[20];
    int age;
};

struct Person *people[3];

people[0] = malloc(sizeof(struct Person));
strcpy(people[0]->name, "Tom");
people[0]->age = 20;

people[1] = malloc(sizeof(struct Person));
strcpy(people[1]->name, "Jerry");
people[1]->age = 25;

people[2] = malloc(sizeof(struct Person));
strcpy(people[2]->name, "Alice");
people[2]->age = 30;

2. 使用靜態初始化：通過靜態方式初始化每個元素。例如：

struct Person {
    char name[20];
    int age;
};

struct Person *people[3] = {
    &(struct Person){"Tom", 20},
    &(struct Person){"Jerry", 25},
    &(struct Person){"Alice", 30}
};

3. 使用循環初始化：通過循環為每個元素賦值。例如：

struct Person {
    char name[20];
    int age;
};

struct Person *people[3];
char names[3][20] = {"Tom", "Jerry", "Alice"};
int ages[3] = {20, 25, 30};

for (int i = 0; i < 3; i++) {
    people[i] = malloc(sizeof(struct Person));
    strcpy(people[i]->name, names[i]);
    people[i]->age = ages[i];
}

需要注意的是，在使用完結構體指針數組后，需要手動釋放內存。