c - 函数内的malloc char *，valgrind报告内存泄漏

我对C很陌生，我正在做玩具程序来学习它。
以下代码编译并正确输出，但Valgrind报告内存泄漏：

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

void add_vertex(vertex *v_p, char *name) {
    if(strlen(name) == 0) {
        printf("error");
    }
    v_p->name = (char *)malloc(strlen(name) + 1);
    if(v_p->name == NULL) {
        printf("error");
    }
    strcpy(v_p->name, name);
    v_p->cluster = -1;
    v_p->deleted = 0;
    printf("added vertex.\n");
}

void free_vertex(vertex *ver) {
    if(ver->name) {free(ver->name);printf("free'd name\n");}
    free(ver);

}

int main() {
    int Nu = 0;
    vertex *arr = (vertex *)malloc(2 * sizeof(vertex));
    vertex *_temp;
    int i =0;
    add_vertex(arr, "Hello");
    add_vertex(arr+1, "World");
    _temp = (vertex *)realloc(arr, 4*sizeof(vertex));
    printf("reallocated\n");
    if (_temp != NULL) {
        arr = _temp;
        add_vertex(arr+2, "this");
        add_vertex(arr +3, "worked");
        Nu=4;
    }
    else{
        printf("FAIL\n");
        Nu=2;
    }
    for (; i <Nu; i++) {
        printf("%s\n",(arr+i)->name);
    }
    for (; i <Nu; i++) {
       free_vertex(arr+i);
    }
    free(arr);
    return 0;
}

顶点编码在头文件中，

typedef struct vertex_t
{
    char*   name;
    int     cluster;
    int    deleted;
}vertex

输出为：

added vertex.
added vertex.
reallocated
added vertex.
added vertex.
Hello
World
this
worked

它没有打印“免费记忆”，那么它在哪里免费的？
下面是瓦尔格林不得不说的：

==1436== HEAP SUMMARY:
==1436==     in use at exit: 24 bytes in 4 blocks
==1436==   total heap usage: 6 allocs, 2 frees, 120 bytes allocated
==1436==
==1436== 5 bytes in 1 blocks are definitely lost in loss record 1 of 4
==1436==    at 0x4C2893D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1436==    by 0x4006C3: add_vertex (graph.c:10)
==1436==    by 0x4007EF: main (graph.c:37)
==1436==
==1436== 6 bytes in 1 blocks are definitely lost in loss record 2 of 4
==1436==    at 0x4C2893D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1436==    by 0x4006C3: add_vertex (graph.c:10)
==1436==    by 0x400797: main (graph.c:31)
==1436==
==1436== 6 bytes in 1 blocks are definitely lost in loss record 3 of 4
==1436==    at 0x4C2893D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1436==    by 0x4006C3: add_vertex (graph.c:10)
==1436==    by 0x4007AC: main (graph.c:32)
==1436==
==1436== 7 bytes in 1 blocks are definitely lost in loss record 4 of 4
==1436==    at 0x4C2893D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==1436==    by 0x4006C3: add_vertex (graph.c:10)
==1436==    by 0x400804: main (graph.c:38)
==1436==
==1436== LEAK SUMMARY:
==1436==    definitely lost: 24 bytes in 4 blocks
==1436==    indirectly lost: 0 bytes in 0 blocks
==1436==      possibly lost: 0 bytes in 0 blocks
==1436==    still reachable: 0 bytes in 0 blocks
==1436==         suppressed: 0 bytes in 0 blocks

代码有什么问题我应该以不同的方式分配顶点的名称吗？
谢谢你的帮助！
编辑：谢谢大家我已经修复了代码，现在我没有释放单个元素，即。

void free_vertex(vertex *ver) {
    if(ver->name) {free(ver->name);printf("free'd name\n");}
}

当然，还要将i重新设置为0。真不敢相信我忽略了谢谢！

最佳答案

您不会在释放代码的循环中重置i这些循环应该如下所示：

for (i = 0; i <Nu; i++) {
    printf("%s\n",(arr+i)->name);
}
for (i = 0; i <Nu; i++) {
   free_vertex(arr+i);
}

又加了一点：
free_vertex（）不应具有：

free(ver)

台词，别人都这么说。
free_vertex（）和add_vertex（）应该是并行的，因为free只释放add中分配的内容。