字符串操作函數strtok用法：
char* strtok（char* src，char* split）；
函數參數：
src：被分割的字符串
split：分割的標志，分割字符串
函數返回值：
成功：返回被分割出的字符串
失敗：NULL
分割字符串后原串src變成第一次分割成功后分割出的字符串。
（1）首次分割 ： char* p = strtok(src,split);
（2）往后繼續分割：
char* p1 = strtok（NULL，split）；
char* p2 = strtok（NULL，split）；
…

在完整功能中的用法實例

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <fcntl.h> #define INFO_SIZE 128 char* getText(char *src) {if(!src){return NULL;}/*strtok用法如下：*/char *p = strtok(src,"=");p = strtok(NULL,"=");return p; }int main() {FILE* fp = NULL;fp = fopen("1.txt","r");if(!fp){return -1;}char* p = NULL;char recv[INFO_SIZE] = {0};char data[20] = {0};char *name = NULL;char *age = NULL;char *phone = NULL;char recv_next[INFO_SIZE] = {0};printf("please input :\n");fgets(data,INFO_SIZE,stdin);data[strlen(data) - 1] = '\0';if(strstr(data,"name") != NULL){p = getText(data);if(!p){return -1;}printf("p = %s\n",p);while(fgets(recv,INFO_SIZE,fp) != NULL && recv[0] != '\n'){if(strncmp(recv,p,strlen(p)) == 0 && recv[strlen(p)] == ','){name = strtok(recv,",");age = strtok(NULL,",");phone = strtok(NULL,",");printf("recv = %s\n",recv);printf("output:age = %s,phone = %s\n",age,phone);}memset(recv,0,INFO_SIZE);}}else if(strstr(data,"age") != NULL){p = getText(data);if(!p){return -1;}while(fgets(recv,INFO_SIZE,fp) != NULL && recv[0]!='\n'){strcpy(recv_next,recv);name = strtok(recv_next,",");age = strtok(NULL,",");phone = strtok(NULL,",");if(strncmp(age,p,strlen(p)) == 0 && recv[strlen(name) + 1 + strlen(age)] == ','){//if(strncmp(age,p,strlen(p)) == 0)//{name = strtok(recv,",");age = strtok(NULL,",");phone = strtok(NULL,",");printf("output : name = %s,phone = %s\n",age,phone);}memset(recv,0,INFO_SIZE);memset(recv_next,0,INFO_SIZE);} }else{return -1;}fclose(fp);return 0;} 

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