strtok函数的介绍

_str指被分解的字符串? ?delim指分隔符字符串? 返回类型是指针

strtok()用来将字符串分割成一个个片段。参数s指向欲分割的字符串，参数delim则为分割字符串中包含的所有字符。当strtok()在参数s的字符串中发现参数delim中包含的分割字符时,则会将该字符改为\0 字符。在第一次调用时，strtok()必需给予参数s字符串，往后的调用则将参数s设置成NULL。每次调用成功则返回指向被分割出片段的指针。

example:

"fafdsas,dkslafkaf,dsaf,dsa,as,a,kfldadg"? ","

第一次调用??"fafdsas'\0'(第二次从这里指向开始)dkslafkaf,dsaf,dsa,as,a,kfldadg"

"fafdsas'\0'dkslafkaf'\0'dsaf,dsa,as,a,kfldadg"

"fafdsas'\0'dkslafkaf'\0'dsaf'\0'dsa,as,a,kfldadg"

"fafdsas'\0'dkslafkaf'\0'dsaf'\0'dsa'\0'as,a,kfldadg"

"fafdsas'\0'dkslafkaf'\0'dsaf'\0'dsa'\0'as'\0'a,kfldadg"

"fafdsas'\0'dkslafkaf'\0'dsaf'\0'dsa'\0'as'\0'a'\0'kfldadg"

最后指向最后'\0' 返回NULL

#include <string.h>
#include <stdio.h>
int main()
{
?? ?char arr[128] = { '\0'};
?? ?char* str[128];
?? ?int i = 0;
?? ?int z = 0;
?? ?gets(arr);
?? ?str[z] = strtok(arr," ");
?? ?while( str[z] != NULL )
?? ?{
?? ??? ?z++;
?? ??? ?str[z] = strtok(NULL," ");第二次使用时可以不用写arr,而是写NULL
?? ?}
?? ?for( i = 0 ; i < z; i++)
?? ?{
?? ??? ?printf("%s\n",str[i]);
?? ?}
?? ?return 0;
}