c语言简单编程 大小写问题

Question

11 – 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);• Hint2 : The difference between A and a is 32• Use the getchar() and putchar()

Answer 1

#include
void main()
{
char x='a';
printf("Input Alphabet：");
scanf("%c",&x);
if( x>='A' && x<='Z')
{

x=x+32;
printf("Result : %c\n",x);
}
else if( x>='a' && x<='z')
{
x=x-32;
printf("Result : %c\n",x);
}

else
printf("Wrong input ! try again");
}