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;
}