Question

90: if (links->info[links->length-1].paths = malloc(connections*sizeof(char*))==NULL) {
        perror("Malloc failed! Aborting execution\n"); exit(MF);}
for (j=0; j<connections; j++) {
93:    if (links->info[links->length-1].paths[j] = malloc(250*sizeof(char))==NULL) {
    perror("Malloc failed! Aborting execution\n"); exit(MF);}
}

，其中

 Link *links;
 int connections;
 typedef struct{               //Info of the link
   int inode;                  //I-node
   int prime_inode;            //Corresponding i-node
   int connections;            //Number of hard links
   int next_path;              //Where to put the next path
   char **paths;               //Paths that refer to the i-node
  } Link_info;

typedef struct {
   int length;                 //Number of links
   Link_info *info;            //The array of the link info
}Link;

我得到了这些警告

 traverse.c:90:52: warning: assignment makes pointer from integer without a cast [enabled by default]
 traverse.c:93:59: warning: assignment makes pointer from integer without a cast [enabled by default]

我想创建一个字符串数组，其中包含“连接”＃个单元格，每个字符串最多包含250个字符。我想知道这有什么不对。

Answer 1

links->info[links->length-1].paths = malloc(connections*sizeof(char*))==NULL

==优先于=。这应该是

(links->info[links->length-1].paths = malloc(connections*sizeof(char*))) == NULL

警告：赋值从整数中生成指针，而没有在malloc处进行强制转换[默认情况下启用]

1 个答案: