c语言代码解决问题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<string.h>

int main()

{

    char str[101];

    int n,i;

    scanf("%d", &n);

    while (getchar() != '\n');

    while (n--)

    {

        fgets(str, sizeof(str), stdin);

        if (str[0] >= 'a' && str[0] <= 'z')

        {

            str[0] = (char)(str[0] - 32);

        }

        for (i = 1; i < strlen(str); i++)

        {

            if (str[i] >= 'A' && str[i] <= 'Z')

                str[i] = (char)(str[i] + 32);

            if (str[i] == '\n')

            {

                str[i] = '\0';

            }

        }

        printf("%s\n", str);

    }

    return 0;

}