.
#include<stdio.h>
#include<string.h>
#include<Windows.h>
#deneMAX_COUNT 1024
#deneILLEGAL_CHAR_ERR 1
#deneUNKNOWN_OPERATOR_ERR 2
/*从标准输入读入第一个非空白字符(换行符除外)*/
char getnbc()
{
char ch;
ch = getchar();
while (1)
{
if (ch == '' || ch == ' ' || ch == ' ')
{
ch = getchar();
}
else
{
break;
}
}
return ch;
}
/*判断 character 是否为字母*/
bool letter(charcharacter)
{
if ((character >= 'a'&&character <= 'z') || (character >= 'A'&&character <= 'Z'))
returntrue;
else
returnfalse;
}
/*判断 character 是否为数字*/
bool digit(charcharacter)
{
if (character >= '0'&&character <= '9')
returntrue;
else
returnfalse;
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