strtok

函数第一次调用需设置两个参数。第一次分割的结果，返回串中第一个" " 之前的字符串,也就是上面的程序第一次输出abc。 第二次调用该函数strtok(NULL," "),第一个参数设置为NULL。结果返回分割依据后面的字串，即第二次输出d。 strtok是一个线程不安全的函数，因为它使用了静态分配的空间来存储被分割的字符串位置 线程安全的函数叫strtok_r, 运用strtok来判断ip或者mac的时候务必要先用其他的方法判断’.‘或’:'的个数，因为用strtok截断的话，比如："192…168.0…8…"这个字符串，strtok只会截取四次，中间的…无论多少都会被当作一个key #include<iostream> #include<vector> #include<stdio.h> #include<string.h> using namespace std; int main(){ char sentence[1024]; scanf("%[^.]",&sentence);// .作为字符串输入的结束符 char *tokenPtr=strtok(sentence," ");//sentence必须是一个char数组，不能是定义成指针形式 vector<string> v; while(tokenPtr!=NULL){ v.push_back(tokenPtr);

Ok, so I understand that strtok modifies its input argument, but in this case, it's collapsing down the input string into only the first token. Why is this happening, and what can I do to fix it? (Please note, I'm not talking about the variable "temp", which should be the first token, but rather the variable "input", which after one call to strtok becomes "this") #include <string.h> #include <stdlib.h> #include <stdio.h> int main(int argc, char* argv[]) { char input[]="this is a test of the tokenizor seven"; char * temp; temp=strtok(input," "); printf("input: %s\n", input); //input is now just

I am new to C and I am trying to split a date/time string into separate variables. However, when I step through the code in gdb line by line, it works, however, when I let it run through normally without breakpoints it seg faults and I can't see why. Below is the code: char * dateTimeString = "2011/04/16 00:00"; char dateVar[11]; char timeVar[6]; if (splitTimeAndDateString(dateVar, timeVar, dateTimeString)) { exit(1); } printf("Date: %s\tTime: %s\n", dateVar, timeVar); Below is the function int splitTimeAndDateString(char date[11], char time[6], char * dateString) { char *token; token = strtok