我有一个字符串" 1 | 4 | 1577 | 1 | 10.22.33 | 7001390280000019 ||||| 172.20.5.20 | 1"我想拆分这个字符串来得到这样的结果:
1
4
1577
10.22.33
7001390280000019
null
null
null
null
172.20.5.20
1
但是当我在一段时间内使用strtok时,没有任何内容的管道没有显示,所以我的结果如下:
1
4
1577
1
10.22.33
7001390280000019
172.20.5.20
1
我怎样才能得到这个结果?
这是我的代码:
int main(argc,argv)
int argc;
char *argv[];
{
char *var1="1|4|1577|1|10.22.33|7001390280000019|||||172.20.5.20|1";
char *var2=malloc(strlen(var1)+1);
strcpy(var2,var1);
while ((var2 = strtok(var2, "|")) != NULL){
printf("<<%s>>\n", var2);
var2= NULL;
}
return 0;
}
提前致谢
答案 0 :(得分:1)
以下是一个关于如何使用strsep
和strdup
的示例:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
char *var1="1|4|1577|1|10.22.33|7001390280000019|||||172.20.5.20|1";
char *p, *var2, *var3;
var2=strdup(var1); // allocates enough space for var1 and copies the contents
var3=var2; // save off var2, since strsep changes it
while ((p = strsep(&var2,"|")) != NULL) { // p contains the token
printf("<<%s>>\n", p);
}
free(var3); // var2 is now NULL, so use var3 instead
return 0;
}
输出:
<<1>>
<<4>>
<<1577>>
<<1>>
<<10.22.33>>
<<7001390280000019>>
<<>>
<<>>
<<>>
<<>>
<<172.20.5.20>>
<<1>>
答案 1 :(得分:0)
感谢@BLUEPIXY和@dbush,代码完成如下:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *strsep(char **sp, const char *sep);
int main()
{
char *var1="1|4|1577|1|10.22.33|7001390280000019|||||172.20.5.20|1";
char *p, *var2, *var3;
var2=strdup(var1); // allocates enough space for var1 and copies the contents
var3=var2; // save off var2, since strsep changes it
while ((p = strsep(&var2,"|")) != NULL) { // p contains the token
printf("<<%s>>\n", p);
}
free(var3); // var2 is now NULL, so use var3 instead
return 0;
}
char *strsep(char **sp, const char *sep){
char *p, *s;
if (sp == NULL || *sp == NULL || **sp == '\0') return(NULL);
s = *sp;
p = s + strcspn(s, sep);
if (*p != '\0') *p++ = '\0';
*sp = p;
return(s);
}
结果:
<<1>>
<<4>>
<<1577>>
<<1>>
<<10.22.33>>
<<7001390280000019>>
<<>>
<<>>
<<>>
<<>>
<<172.20.5.20>>
<<1>>