vollhorst's Calculator (first c++ application :)

[vollhorst]

vollhorst's Calculator (C++):

Hi,

yesterday i started to learn c++ and now i just finished my first c++ calculator:

#include <iostream> 

using namespace std;



int main (void)

{

	cout << "Calculator" << endl << "by vollhorst" << endl << endl;

	cout << "Please chose an operation:" << endl << endl;
	cout << "\t 1 for + (addition)" << endl;
	cout << "\t 2 for - (suntraction)" << endl;
	cout << "\t 3 for * (multiplication)" << endl;
	cout << "\t 4 for / (division)" << endl;
	cout << "\t 5 for % (percent)" << endl << endl;
	cout << "Operation:";
	
	int i1;
	cin >> i1;
	
	
	
	cout << endl << "Please enter your first value:"; 
	
	double d1;
	cin >> d1;												// First value for the operation

	cout << endl << "Please enter your second value:"; 
	
	double d2;
	cin >> d2;												// Second value for the operation
	
	double d3;
	
		
	if (i1 == 1) d3 = d1 + d2;								// decision which operation should be executed + definition of the operation
	if (i1 == 2) d3 = d1 - d2;								// decision which operation should be executed + definition of the operation
	if (i1 == 3) d3 = d1 * d2;								// decision which operation should be executed + definition of the operation
	if (i1 == 4) d3 = d1 / d2;								// decision which operation should be executed + definition of the operation
	if (i1 == 5) d3 = (d1 /100) * d2;						        // decision which operation should be executed + definition of the operation
		
	cout << endl << endl << "Result:" << d3 << endl << endl;// output
	
	
cin.get();													
cin.get();

	return(0);
}

What do you think about it??

[Lrrpdude]

Pretty messy but not bad if you just started.
You could use case statements instead of those if statements.
Start looking into functions and calling them next.

-Loops are very useful too(don't really need it for this though).

I see a ton of unneeded endls lol.

\n inside the quotations in your cout statements work like an endl.

you don't need 2 cin.get();


system("pause"); or

cin.ignore();
cin.get();

to keep the console open but i'm sure there are plenty of other ways.

[vollhorst]

ok, thx for your suggestions

[zip]

my version of vollhorst's Calculator (C++) ^^
source code

#include <iostream>
#include <Windows.h>


HANDLE console_output = GetStdHandle(STD_OUTPUT_HANDLE);

#define console_text_red                   SetConsoleTextAttribute(console_output, FOREGROUND_RED| FOREGROUND_INTENSITY);
#define console_text_pink                  SetConsoleTextAttribute(console_output, FOREGROUND_BLUE | FOREGROUND_RED| FOREGROUND_INTENSITY);
#define console_text_green                 SetConsoleTextAttribute(console_output, FOREGROUND_GREEN| FOREGROUND_INTENSITY);

using namespace std;





int main()
{
    {
        system("title What is this :)");
        console_text_red
    printf("Calculator\n"); 
        console_text_pink
    printf("by vollhorst\n");
        console_text_green
        
        

    cout << "Please chose an operation:" << endl << endl;
    cout << "\t 1 for + (addition)" << endl;
    cout << "\t 2 for - (suntraction)" << endl;
    cout << "\t 3 for * (multiplication)" << endl;
    cout << "\t 4 for / (division)" << endl;
    cout << "\t 5 for % (percent)" << endl << endl;
    cout << "Operation:";
    
    int i1;
    cin >> i1;
    
    system("cls");
    
    cout << endl << "Please enter your first value:"; 
    
    double d1;
    cin >> d1;                                                // First value for the operation

    cout << endl << "Please enter your second value:"; 
    
    double d2;
    cin >> d2;                                                // Second value for the operation
    
    double d3;
    
        
    if (i1 == 1) d3 = d1 + d2;                                // decision which operation should be executed + definition of the operation
    if (i1 == 2) d3 = d1 - d2;                                // decision which operation should be executed + definition of the operation
    if (i1 == 3) d3 = d1 * d2;                                // decision which operation should be executed + definition of the operation
    if (i1 == 4) d3 = d1 / d2;                                // decision which operation should be executed + definition of the operation
    if (i1 == 5) d3 = (d1 /100) * d2;                                // decision which operation should be executed + definition of the operation
    
        
    console_text_red 
        cout << endl << endl  <<  "Result:" << d3 << endl << endl;// output
    
    
system("pause");

    return 0;
}
} 

[vollhorst]

nice :)

[JeliX]

Re: vollhorst's Calculator (first c++ application :)

Пиздец уродливый дизайн :]