poj 3981 字符串替换

字符串替换

Time Limit: 1000MS		Memory Limit: 65536K
Total Submissions: 10871		Accepted: 5100

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>
char str[1003];

int main(){
    int i;
    while(gets(str)){
        for(i = 0; str[i] != ''; i++){
            if(str[i] == 'y' && str[i+1] == 'o' && str[i+2] == 'u'){
                printf("we");
                i += 2;
            } else {
                printf("%c", str[i]);
            }
        }
        printf("");
        printf("
");
    }
    return 0;
}