reverse_all_part_words

#include <stdio.h>#include <string.h>void reverse(char str[], int beg, int end){    char tmp;    while (beg < end)    {        tmp      = str[beg];        str[beg] = str[end];        str[end] = tmp;        ++beg;        --end;    }    }int main(){    char str[] = "apple one a student hello world";    int  beg = 0;    int  end = strlen(str) - 1;    int  cur;        printf("reverse all : ");    reverse(str, beg, end);    puts(str);        beg = 0;    cur = 0;    while (str[cur] != '\0')    {        ++cur;        if (str[cur] == ' ')        {            --cur;            reverse(str + beg, 0, cur - beg);            beg = cur + 2;            cur = beg;        }            }    if (str[cur] == '\0')    {        --cur;        reverse(str + beg, 0, cur - beg);    }        printf("reverse part: ");    puts(str);        return 0;}