题解 | #字母大小写转换#

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	char ch = 0;
	while (scanf("%c", &ch) != EOF)
	{
		if (ch >= 'a' && ch <= 'z')
		{
			printf("%c\n", ch - 32);
		}
		if (ch >= 'A' && ch <= 'Z')
		{
			printf("%c\n", ch + 32);
		}
		getchar();
	}
	return 0;
}