poj3981字符串替换 水的以至于浪费时间的水题

字符串替换

Time Limit: 1000MS		Memory Limit: 65536K
Total Submissions: 7433		Accepted: 3526

Description

编写一个C程序实现将字符串中的所有"you"替换成"we"

Input

输入包含多行数据

每行数据是一个字符串，长度不超过1000
数据以EOF结束

Output

对于输入的每一行，输出替换后的字符串

Sample Input

you are what you do

Sample Output

we are what we do

#include<stdio.h>
#include<string.h>
int main()
{
	int i,j;
	char s[1200];
	while(gets(s))
	{
		int d=strlen(s);
		for(i=0;i<d;i++)
		{
			if(s[i]=='y'&&i+2<d&&s[i+1]=='o'&&s[i+2]=='u')
			{
				if(i==0&&(s[i+3]=='\0'||s[i+3]==' ')) {s[0]='w';s[1]='e';s[2]='+';}
				else
					if(i==d-3&&s[d-4]==' ') {s[i]='w';s[i+1]='e';s[i+2]='+';}
					else
					{
						if(s[i-1]==' '&&s[i+3]==' ') {s[i]='w';s[i+1]='e';s[i+2]='+';}
					}
			}
		}
		for(i=0;i<d;i++)
			if(s[i]!='+') printf("%c",s[i]);
	    printf("\n");
	}
	return 0;
}