用函数fgets，输入任意字符串，最多100个字符，分两行输出大写和小写，大写小写都要输出，详情和案例在下面两张图片中

Question

Answer 1

#include <stdio.h>
int main()
{
    char s[101],A[101]={0},a[101]={0};
    int i=0,nA=0,na=0;
    gets(s);
    while(s[i] ! = 0)
    {
        if(s[i] >='A' && s[i] <='Z')
        {
            A[nA++] = s[i];
            a[na++] = s[i] + 32;
        }
        else if(s[i] >='a' && s[i] <= 'z')
        {
            a[na++] = s[i];
            A[nA++] = s[i] - 32;
        }
        i++;
    }
    printf("%s\n%s",A,a);
    return 0;
}