翻转字符串

#include <stdio.h>
#include<stdlib.h>
void reverse(char *left, char *right)
{
while(left<right)
{
char tmp = *left;
*left = *right;
*right = tmp;
left++;
right--;
}
}
void reverse_str(char arr[], int sz)
{
char *left = arr;
char *right = arr+sz-1;
char *start = arr;
char *end = arr;
reverse(left, right);
while(*end != '\0')
{
while((*end != ' ') && (*end != '\0'))
{
end++;
}
reverse(start, end-1);
if(*end != '\0')
{
start = end+1;
end = start;
}
}
}

int main()
{
char arr[] = "student a am i";
int sz = sizeof(arr)/sizeof(arr[0])-1;
reverse_str(arr, sz);
printf("%s\n",arr);
system("pause");
return 0;
}