int main(int argc, char* argv[]) //用cmd传参的方法输入数据
{
if (strcmp(argv[1],"-f") == 0) //"-f" 用文件输入输出
{
freopen(argv[2],"r",stdin);
freopen(argv[3],"w",stdout);
string str;
while (cin >> str)
{
/*定义在循环内,缩小变量作用域,代替每次的初始化，避免造成多次输出留下问题 */
Scan get_scanf;
Print put_printf;
get_scanf.ToStringQueue(str);
CheckInput *ck = new CheckInput;
get_scanf.ErrorType += ck->CheckIfCorrect(get_scanf.que); //存入输入错误类型
if (get_scanf.ErrorType == "") //判断输入是否合法,无错误类型则合法
{
Calculation *cal = new Calculation;
cal->Calculate(get_scanf.que); //计算
put_printf.PrResult(cal->result);
delete cal;
}
else
{
put_printf.PrErTpye(get_scanf.ErrorType); //输出计算结果
}
str = "";
delete ck;
}
}
int main(int argc, char** argv)
{
string input;
string parameter;
double result;
queue<string> seperatedExpression;
Scan scan;
Calculation cal;
Print print;
parameter = argv[1];
cout << setprecision(precision);
if (parameter == "-a") //输入参数为 -a 的情况，输出表达式
{
input = argv[2];
seperatedExpression = scan.ToStringQueue(input);
if (seperatedExpression.front() == "ERROR") //若返回字符串为 ERROR 则报错并退出循环
{
print.PrintLengthError();
return 0;
}
result = cal.Calculate(seperatedExpression);
print.PrintA(input,result);
}
else if (parameter == "-f") //输入参数为 -f 的情况，对文件进行读写
{
if (scan.Open(argv[2]) && print.Open(argv[3]))
{
while (!scan.IsEOF()) //循环读入每行，计算和写入文件
{
result = 0;
while(!seperatedExpression.empty())
{
seperatedExpression.pop();
}
scan.Read();
if (scan.GetInput() == "")
{
continue;
}
seperatedExpression = scan.ToStringQueue(scan.GetInput());
if (seperatedExpression.front() == "ERROR")
{
print.PrintLengthError();
continue;
}
result = cal.Calculate(seperatedExpression);
print.PrintF(result);
}
scan.Close();
print.Close();
}
else
{
cout << "Open file failed.";
return 0;
}
}
else //无参数情况
{
input = argv[1];
seperatedExpression = scan.ToStringQueue(input);
if (seperatedExpression.front() == "ERROR")
{
print.PrintLengthError();
return 0;
}
result = cal.Calculate(seperatedExpression);
print.DefaultPrint(result);
}
return 0;
}
