PAT gets 替代方法

#include<cstdio>
#include<cstring>

int main() {
    char str1[50], str2[50];
    fgets(str1,50, stdin);
    int i = 0;
    while (str1[i] != '\n')
        i++;
    str1[i] = '\0';
    fgets(str2, 50, stdin);
    i = 0;
    while (str2[i] != '\n')
        i++;
    str2[i] = '\0';
    printf("%s\n", str1);
    printf("%s\n", str2);

    return 0;
}