未定義對“ strtok_r” Windows 10 MinGW的引用

Question

我在編譯時總是出錯，它是對`strtok_r'的未定義引用，我在Windows 10中使用MinGW，請幫助解決此問題。

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


int main(int argc, char **argv) {
  char *test1, *test2;
  char *state1, *state2;
  char *cur1, *cur2;

  test1 = malloc(20);
  test2 = malloc(20);
  strcpy(test1, "a,b,c,d");
  strcpy(test2, "e,f,g,h");

  cur1 = strtok_r(test1, ",", &state1);
  cur2 = strtok_r(test2, ",", &state2);
  while (cur1 != NULL && cur2 != NULL) {
    if (cur1 != NULL) {
      printf("cur1 : %s\n", cur1);
    }
    if (cur2 != NULL) {
      printf("cur2 : %s\n", cur2);
    }
    cur1 = strtok_r(NULL, ",", &state1);
    cur2 = strtok_r(NULL, ",", &state2);
  };
}

這是Windows 10中的錯誤和警告消息

strtok-test.c: In function 'main':
strtok-test.c:16:10: warning: implicit declaration of function 'strtok_r' [-Wimplicit-function-declaration]
   cur1 = strtok_r(test1, ",", &state1);
          ^~~~~~~~
strtok-test.c:16:8: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
   cur1 = strtok_r(test1, ",", &state1);
        ^
strtok-test.c:17:8: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
   cur2 = strtok_r(test2, ",", &state2);
        ^
strtok-test.c:25:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     cur1 = strtok_r(NULL, ",", &state1);
          ^
strtok-test.c:26:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     cur2 = strtok_r(NULL, ",", &state2);
      ^
C:\Users\AppData\Local\Temp\ccvzdBJh.o: In function `main':
C:\Users\Desktop\New folder/strtok-test.c:16: undefined reference to `strtok_r'
C:\Users\Desktop\New folder/strtok-test.c:17: undefined reference to `strtok_r'
C:\Users\Desktop\New folder/strtok-test.c:25: undefined reference to `strtok_r'
C:\Users\Desktop\New folder/strtok-test.c:26: undefined reference to `strtok_r'
collect2.exe: error: ld returned 1 exit status

Answer 1

strtok_r不是標准的C方法（它是POSIX）。 您的編譯器可能不符合POSIX，因此其標准庫可能不包含該方法。 查看您的string.h文件，看看是否在其中聲明了其原型。