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

法一
代码如下：

#include <iostream>
using namespace std;
const int N = 1010;
char str[N];int main() {while (gets(str) != NULL) {for (int i  = 0; str[i] != '\0'; i++) {if (str[i] == 'y' && str[i + 1] == 'o' && str[i + 2] == 'u') {printf("we");i = i + 2;} elseprintf("%c", str[i]);}printf("\n");}return 0;
}

法二
代码如下：

#include <iostream>
#include <cstdio>
using namespace std;int main() {char c1, c2, c3;while ((c1 = getchar()) != EOF) {if (c1 == 'y') {if ((c2 = getchar() ) == 'o') {if ((c3 = getchar()) == 'u') {printf("we");} elseprintf("yo%c", c3);} elseprintf("y%c", c2);} elseprintf("%c", c1);}return 0;
}

法三
代码如下:

#include <iostream>
#include <string>
using namespace std;int main() {string str;while (getline(cin, str)) {int pos;while ((pos = str.find("you")) != -1) {str.replace(pos, 3, "we");}cout << str << endl;}return 0;
}