將:"student a am i", 改為"i am a student

有一個(gè)字符數(shù)組的內(nèi)容為:"student a am i",
請(qǐng)你將數(shù)組的內(nèi)容改為"i am a student".

思路：首先將整句話(huà)逆置 后將每個(gè)單詞逆置故需要一個(gè)逆置函數(shù)；另外一個(gè)難點(diǎn)是如何判斷單詞的結(jié)束位置，下面是代碼

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
'''
void Reverse( char left, char right)
{
while (left < right)
{
char tmp = left;
left = right;
right = tmp;
left++;
right--;
}
}
ReverseSentence(char arr,int len)
{
//逆置整個(gè)句子
char left = arr;
char right = arr+len - 1;
charp = arr;
Reverse(left, right);
//逆置每個(gè)單詞
while (p != '\0')
{
char start = p;//start會(huì)指向每一個(gè)單詞的開(kāi)始
while (p != ' '&&p != '\0')
{
p++;
}
Reverse(start, p - 1);//將單詞的首字母和尾字母?jìng)魅肽嬷煤瘮?shù)
if (*p == ' ')
{
p++;
}
}

}

int main()
{

char arr[] = "i am a student";
int len = strlen(arr);
ReverseSentence(arr,len);
printf("%s",arr);
system("pause");
return 0;

}
'''