我知道它的簡單代碼,我該如何解決「系統未在範圍內聲明」問題?系統未在範圍內聲明?
#include<iostream>
using namespace std;
int main(void)
{
system ("TITLE Calculator");
system ("COLOR 2");
char cChar;
double dfirstnumber;
double dsecondnumber;
char cDoagain;
do
{
system("CLS");
cout << "Please enter the first number you would like to use."<< endl;
cin >> dfirstnumber;
cout<< "Please enter the operation you would like to perform." << " (+,-,*,or /)" << endl;
cin >> cChar;
cout<< "Please enter the second number you would like to use." << endl;
cin >> dsecondnumber;
switch (cChar)
{
case '+':
cout << "The answer is: " << dfirstnumber << "+" << dsecondnumber << "=" <<
(dfirstnumber + dsecondnumber) << endl;
break;
case '-':
cout << "The answer is: " << dfirstnumber << "-" << dsecondnumber << "=" <<
(dfirstnumber - dsecondnumber) << endl;
break;
case '*':
cout << "The answer is: " << dfirstnumber << "*" << dsecondnumber << "=" <<
(dfirstnumber * dsecondnumber) << endl;
break;
case 'x':
cout << "The answer is: " << dfirstnumber << "x" << dsecondnumber << "=" <<
(dfirstnumber * dsecondnumber) << endl;
break;
case 'X':
cout << "The answer is: " << dfirstnumber << "X" << dsecondnumber << "=" <<
(dfirstnumber * dsecondnumber) << endl;
break;
case '/':
if(dsecondnumber == 0){
cout<< "That is an invalid operation." << endl;}
else{
cout << "The answer is: " << dfirstnumber << "/" << dsecondnumber << "=" <<
(dfirstnumber/dsecondnumber) << endl;
}
break;
default:
cout << "That is an invalid operation." << endl;
break;
}
cout << "Would you like to start again? (Y/N)" << endl;
cin >> cDoagain;
}while (cDoagain == 'Y' or cDoagain == 'y');
system("PAUSE");
return 0;
}
繼承人我最終的消息:
C:\Documents and Settings\Nilo\My Documents\Work\Testing\main.cpp||In function 'int main()':| C:\Documents and Settings\Nilo\My Documents\Work\Testing\main.cpp|8|error: 'system' was not declared in this scope||
|=== Build finished: 1 errors, 0 warnings ===|
什麼是'system(「TITLE Calculator」); 系統(「COLOR 2」);'應該這樣做,cos系統不是一個內置函數 – 2010-10-07 21:20:50