发生内存泄漏，但分配的内存被释放答案

【问题标题】：Getting memory leak but memory allocated was deallocated发生内存泄漏，但分配的内存被释放
【发布时间】：2016-11-03 02:56:04
【问题描述】：

这里是菜鸟。创建了一个模拟足球队的程序来帮助我处理内存分配。我的程序可以运行，但 valgrind 告诉我，我在“create_player”和“add_player_to_club”方法中存在内存泄漏

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define SIZE 8

typedef struct player {
    int id;
    char *position;
} Player;

typedef struct club {
    int size;
    Player *team[SIZE];
} Club;


Player *create_player(int id, const char *description);
void create_team(Club *club);
void print_club(const Club *club);
void destroy_player(Player *player);
void add_player_to_club(Club *club, int id, const char *position);
void destroy_club(Club *club);

int main() {
    Club club;

    create_team(&club);
    add_player_to_club(&club, 1, "forward");
    add_player_to_club(&club, 2, "goalie");
    print_club(&club);
    destroy_club(&club);

    return 0;
}

Player *create_player(int id, const char *description){

    Player *player;

    player = malloc(sizeof(Player));

    if(description == NULL){
        player->position = NULL;

    } else {
        player->position = malloc(strlen(description) + 1);
        strcpy(player->position, description);
        player->id = id;
    }
    return player;
}
void destroy_player(Player *player){

    if (player == NULL){
        return;
    } else {
        free(player->position);
        free(player);
    }
}


void create_team(Club *team){

    team->size = 0;

}
void print_club(const Club *club) {

    int i = 0;

    if (club == NULL) {
        return;
    } else if (club->size == 0) {
        printf("No team members\n");
    } else {
        for (i = 0; i < club->size; i++) {
            printf("Id: %d Position: %s\n", club->team[i]->id,
                   club->team[i]->position);
        }
    }
}
void add_player_to_club(Club *club, int id, const char *position){


    if (club == NULL || club->size >= SIZE) {
        return;
    } else {
        club->team[club->size] = create_player(id, position);
        club->size++;

    }
}
void destroy_club(Club *club){

    int i = 0;

    if (club == NULL) {
        return;
    } else {
        club->size = 0;

        for (i = 0; i < club->size; i++) {

            destroy_player(club->team[i]);
        }
    }
}

我认为问题可能出在我的“破坏俱乐部”方法上。玩家“对象”存储在“团队”数组中。我为每个玩家对象分配了内存，并通过遍历团队数组并释放每个索引来解除分配。我搞砸了什么？

【问题讨论】：

club->size = 0; for (i = 0; i < club->size; i++) { 什么。
this的跟进

标签： c pointers memory-leaks

【解决方案1】：

在destroy_club 中，您将size 设置为0，然后使用它循环播放器，因此它什么都不循环。

在清理播放器之后将size设置为0：

    for (i = 0; i < club->size; i++) {

        destroy_player(club->team[i]);
    }

    club->size = 0;

【讨论】：