我这段代码在cfree5 编译不通过,而在visual c++6.0就通过了...谁能给解释下
#include<stdio.h>
#define SPACE ''
int main()
{
char ch;
ch=getchar();
while(ch!='\n')
{
if(ch==SPACE)//error:empty character constant
putchar(ch);
else
putchar(ch+1);
ch=getchar();
}
putchar(ch);
return 0;
}