有一个字符数组的内容为:"student a am i",请你将数组的内容改为"i am a student".
要求:
不能使用库函数。只能开辟有限个空间(空间个数和字符串的长度无关)
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
void reverse(char *left, char *right)
{
while (left < right)//i ma a tneduts,翻转字符串函数
{
char tmp = *left;
*left = *right;
*right = tmp;
left++;
right--;
}
}
void str_reverse(char *str)//i am a student//翻转每一个单词
{
char *left = str;//取每个单词的左边为第一个
char *right = str + strlen(str)-1;
reverse(left, right);
while (*str)
{
char *start = str;
char *end = NULL;
while (*str != ' ' && *str != '\0')
{
str++;
}
end = str - 1;
reverse(start, end);//翻转单词
if (*str == ' ')
str++;
}
}
int main()
{
char arr[] = "student a am i ";
//[i am a student]
//i ma a tneduts//
//i am a student//
str_reverse(arr);
printf("%s\n", arr);
system("pause");
return 0;
}