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我正在使用 ANSI C 并为我的以下代码获取“警告:传递 'strcpy' 的参数 1 使指针从整数而不进行强制转换”:

#define MAX_LINE_SIZE 1024
#define DELIMITER ","
#define TICKET_NAME_LEN 40
#define TICKET_ZONE_LEN 10

struct stock_data 
{
    char ticket_name[TICKET_NAME_LEN+1];
    char ticket_type;
    char ticket_zone[TICKET_ZONE_LEN+1];
    unsigned int ticket_price;
    unsigned int stock_level;
};

typedef struct stock_node 
{
    struct stock_data * data;
    struct stock_node * next_node;
} stock_node;

char temp_line[MAX_LINE_SIZE];
char *token;
int i, count = 0;

stock_node * snode = NULL;
struct stock_data * sdata = NULL;

FILE *stock_file = fopen( stockfile, "r" );

while (fgets(temp_line, MAX_LINE_SIZE, stock_file) != NULL) {

  token = strtok (temp_line, DELIMITER);
  count++;

  snode = (stock_node *) malloc(count * sizeof(stock_node));
  if (snode == NULL) { abort(); }  

  snode->data = (struct stock_data *) malloc(sizeof(struct stock_data));
  if (snode->data == NULL) { abort(); }  

  i = 1;

  while(token != NULL) {
     switch(i) {
        case 1:
           strcpy(snode[count - 1].data->ticket_name, token);
           break;
        case 2:
           strcpy(snode[count - 1].data->ticket_type, token);
           break;
        case 3:
           strcpy(snode[count - 1].data->ticket_zone, token);
           break;
        case 4:
           strcpy(snode[count - 1].data->ticket_price, token);
           break;
        case 5:
           strcpy(snode[count - 1].data->stock_level, token);
           break;                                                            
     }
     token = strtok (NULL, DELIMITER);
     i++;
  }
}

我收到线路警告:

strcpy(snode[count - 1].data->ticket_type, token); (因为ticket_type是char)
strcpy(snode[count - 1].data->ticket_price, token); (因为ticket_price 是无符号整数)
strcpy(snode[count - 1].data->stock_level, token); (因为 stock_level 是无符号整数)

我知道为什么(有点)但是我不知道如何解决它:(


解决方案是更改开关,使其显示为:

 switch(i) {
    case 1:
       strcpy(snode[count - 1].data->ticket_name, token);
       break;
    case 2:
       snode[count - 1].data->ticket_type = token[0];
       break;
    case 3:
       strcpy(snode[count - 1].data->ticket_zone, token);
       break;
    case 4:
       snode[count - 1].data->ticket_price = atoi(token);
       break;
    case 5:
       snode[count - 1].data->stock_level = atoi(token);
       break;                                                            
 }
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1 回答 1

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您应该使用strcpy() 将源字符串复制到目标字符串中。

如果要先将字符串复制为整数值,则需要将字符串转换为整数,然后进行直接赋值。

例如,您可以使用 atoi()strtol()函数。

于 2013-11-04T11:45:12.497 回答