#include <iostream>
int a;
int b;
int c;
int d;
int main ()
{ using namespace std;

cout << "Enter your first Number" << endl;

cin >> a;

cout << "Enter your second number" << endl; 

cin >> b;

cout << "Enter your third number" << endl;

cin >> c;

cout << "Enter your fourth number" << endl;

cin >> d;

cout << "your numbers added up and Multiplyed by 2 is " << a+b+c+d*2 << endl;

}

#include
int a;
int b;
int c;
int d;
int main ()
{ using namespace std;

cout << "Enter your first Number" <> a;

cout << "Enter your second number" <> b;

cout << "Enter your third number" <> c;

cout << "Enter your fourth number" <> d;

cout << "your numbers added up and Multiplyed by 2 is " << a+b+c+d*2 << endl;

}

#include <iostream>
using namespace std;

long int remainder;
long int x;
long int y;
long int z;
bool expression; 

int main()
{
    cout << "Enter an expression to be evaluated: " << endl;
    cin >> expression;

    if(expression == true + true) /* i.e. if any integer other than zero is
    entered, followed by a plus sign, then another integer other than zero */
    {
    cout << "You entered an addition equation. " << endl;
    }

    if(expression == true/true) /* i.e. if any integer other than zero is
    entered, followed by a division sign, then another integer other than zero */
    {
    cout << "You entered a division equation. " << endl;
    }

    if(expression == true-true) // like above, but with subtraction
    {
    cout << "You entered a subtraction equation. " << endl;
    }

    if(expression == true*true) // and again like above, with multiplication
    {
    cout << "You entered a multiplication equation. " << endl;
    }    

    cin.clear();
    cin.ignore(255, '\n');
    cin.get();
    // ^^ is for Dev C++ so the program stays open until I prompt it to exit
    return 0;                  

}

I have a question:”How can I compile my program if I haven’t finished it yet?”
When i compile to see if i have any error till here,my Bloodshed Dev-C++ “says” that i have too many mistakes!

Thanks a lot again!

#include "stdafx.h"
#include <iostream>

int GetUserInput();
char GetMathematicalOperation();
int CalculateResult(int nInput1, char chOperator, int nInput2);
void PrintResult(int x);
using namespace std;

int main()
{
    // Get first number from user
    int nInput1 = GetUserInput();

    // Get mathematical operation from user
    char chOperator = GetMathematicalOperation();

    // Get second number from user
    int nInput2 = GetUserInput();

    // Calculate result and store into variable nResult
    int nResult = CalculateResult(nInput1, chOperator, nInput2);

    // Print result
    PrintResult(nResult);

    return 0;
}

int GetUserInput()
{
	int input;
	cin >> input;
	return input;
}

char GetMathematicalOperation()
{
	char chOperation;
	cin >> chOperation;
	return chOperation;
}

void PrintResult(int x)
{
	cout << x << endl;
}

int CalculateResult(int nInput1, char chOperator, int nInput2)
{
	int x = (nInput1, chOperator, nInput2);
	return x;
}

#include <cstdlib>
#include <iostream>

using namespace std;

int main()
{
       int GetNumber();

       char GetOperation();

       int GetNumber2();

       int CalResult();

       int PrintResult();
       return 0;
}

int GetNumber()
{
    int x;
    cin >> x;
    return x;
}

char GetOperation()
{
     char chOperation;
     cin >> chOperation;
     return chOperation;
}

int GetNumber2()
{
    int y;
    cin >> y;
    return y;
}

int CalResult(int x, char chOperation, int y);

int PrintResult( CalResult(int x char chOperation int y) );

PrintResult(Presult);

here is the following erros
44 C:\Users\nabeel\main.cpp expected primary-expression before “int”
46 C:\Users\nabeel\main.cpp expected constructor, destructor, or type conversion before ‘(‘ token
46 C:\Users\nabeel\main.cpp expected `,’ or `;’ before ‘(‘ token
C:\Users\nabeel\Makefile.win [Build Error] [main.o] Error 1