#include "stdio.h"
#include "ctype.h"
int main()
{
char ch;
printf("Enter a character, please: ");
scanf("%c",&ch);
if(isalpha(ch))printf("%c",toupper(ch));
else
printf("Enter a character, please.");
return 0;
}
//可以看的懂吧,
不对,要么
#include "stdio.h"
#include "ctype.h"
要么
#include <stdio.h>
#include <ctype.h>
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