[C / C ]The function strtok cut strings – function strtok in string

May 23, 2015 nguyenvanquan7826 Programming 25 responses

The function strtok(s1, s2) returns after the first string s1 cut by the characters in the string s2.
President s1 = “nguyen, of quan” and we use: char *p = strtok(s1,”, “) (surgical marks and spaces) p is the string: nguyen. If you want to cut to the string, we use strtok(NULL,s2) While it will cut the original string starting position that was previously stopped.
I used to do math: input 1 strings, then write that counteracts the words in the string entered (words do not contain commas, dots, how to play) and one per 1 current

	
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
int main()
{
        int index = 0;
        int i;
        char *a = (char *)malloc(100*sizeof(char));
        char **b = (char **)malloc(100*sizeof(char));;
        printf ("Nhap vao chuoi can dao nguoc: ");
        fflush(stdin);
        gets(a);
 
        char *p;
        p = strtok(a, ",. "); //cat chuoi bang cac ky tu ,. va space
        while(p != NULL)
        {
                b[index] = p;
                index++;
                p = strtok(NULL, ",. "); //cat chuoi tu vi tri dung lai truoc do
        }
        for (i = index-1; i>=0; i--) //in ra cac tu theo thu tu dao nguoc
                printf ("\n%s ", b[i]);
        printf ("\n");

        return 0;
}