c语言编程。

Question

Convert lower case to upper case or upper case to lower case• Write a program that inputs a character using ASCII table to convert lower case to upper case or upper case to lower case• Input a character repeatedly using the While statement• Hint1 : fflush(stdin);• Use the getchar() and putchar()• Use the ctype.h and functions associated with ctype.h

Answer 1

int main()
{
    char a;
    while(true)
    {
        printf("Input Alphabat :");
        a = getchar();
        getchar();
        if(a>='a' && a<='z')
            printf("Result : %c\n",a-32);
        else if(a>='A' && a<='Z')
            printf("Result : %c\n",a+32);
        else
            printf("Wrong intput ! try again\n");
    }
    return 0;

}