Programming Forums > Application Development > C

CIRCLE · Sep 19th, 2007, 5:46 PM

Just wondering if there is an easier way like in C++.
This short bit of code opens a file and checks the binary number saved and closes the file. It then converts that number to decimal. Then it checks it against your current score from the end of the game and if it is higher reopens the file and converts that decimal number into binary and saves it to the file.

Is there an easier or even shorter way of doing this. Or is this about it.

(Toggle Plain Text)

void filewrite()
{
    highscoreint = 0;
    highscore = fopen("falling.sdr", "r");
    if (highscore == 0 )
    {
        highscore = fopen("falling.sdr", "w");
        fclose(highscore);
        return;
    }
    i = 0;
    while ((x = fgetc(highscore)) != EOF)
    {
        x -= 48;
        BinaryNum[i] = x;
        i++;
    } 
    for (i = 15, x = 0; i >= 0; i--, x++)
    {
        if (BinaryNum[i] == 1)
            highscoreint += pow(2, x);
        
    }

    textprintf_ex(activepage, font, 250, 240, makecol(0, 0, 0), -1, "High Score: %i", highscoreint);    
    if (highscoreint < score + totalscore)
        flag = 1;
    fclose(highscore);
    
    if (flag)
    {
        highscore = fopen("falling.sdr", "w+");
        if ((score + totalscore) > oldhighscoreint)
        {   
            highscoreint = oldhighscoreint;
            highscoreint = score + totalscore;
            for (i = 15; i >= 0; i--)
            {  
               PlaceHolder = pow(2, i);
               if ((highscoreint) >= PlaceHolder)
               {
                  highscoreint -= PlaceHolder;
                  BinaryNum[i] = 1;
               }
               else
                   BinaryNum[i] = 0;
            }
        }
        for (i = 15; i >= 0; i--)
            fprintf(highscore, "%i", BinaryNum[i]);
        fclose(highscore);
    }
}

CIRCLE · Sep 23rd, 2007, 6:32 PM

With out all the game code this is what it looks like.

(Toggle Plain Text)

#include <stdio.h>
#include <math.h>

int BinaryNum[50];
long ExpLoop;
long PlaceHolder;
long UserNumber;

int main()
{
    printf("Give me a Number to Convert to Binary.  Up to 65536_\n");
    scanf("%i", &UserNumber);
    for (ExpLoop = 15; ExpLoop > 0; ExpLoop--)
        BinaryNum[ExpLoop] = 0;
    for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--)
    {  
        PlaceHolder = pow(2, ExpLoop);
        if (UserNumber >= PlaceHolder)
        {
            UserNumber -= PlaceHolder;
            BinaryNum[ExpLoop] = 1;
        }
    }
    for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--)
        printf("%i", BinaryNum[ExpLoop]);
        
    for (ExpLoop = 0; ExpLoop <= 15; ExpLoop++)
    {
        if (BinaryNum[ExpLoop] == 1)
            UserNumber += pow(2, ExpLoop);
    }   
    printf("\n The Number You used was %i", UserNumber); 
    getch();
    return 0;
}

DaWei · Sep 23rd, 2007, 7:57 PM

This seems simpler, plus it checks the input for success, which one should always do:

(Toggle Plain Text)

#include <iostream>

int main (int argc, char* argv[])
{
    unsigned theNumber;
    unsigned theLength = sizeof (unsigned) * 8;
    unsigned mask = 1 << theLength - 1;

    std::cout << "Enter a number: ";
    if (scanf ("%d", &theNumber) != 1)
    {
        std::cout << "Bad input, dink" << std::endl;
        return 1;
    }
    for (int i = 0; i < theLength; i++)
    {
        if (theNumber & mask) std::cout << '1'; else std::cout << '0';
        mask >>= 1;
    }
    std::cout << endl;
    return 0;
}

Sep 19th, 2007, 5:46 PM	#1
CIRCLE Newbie Join Date: May 2007 Posts: 6 Rep Power: 0	Short Hand Decimal To Binary Vice Versa Good or Bad? Just wondering if there is an easier way like in C++. This short bit of code opens a file and checks the binary number saved and closes the file. It then converts that number to decimal. Then it checks it against your current score from the end of the game and if it is higher reopens the file and converts that decimal number into binary and saves it to the file. Is there an easier or even shorter way of doing this. Or is this about it. (Toggle Plain Text) void filewrite() { highscoreint = 0; highscore = fopen("falling.sdr", "r"); if (highscore == 0 ) { highscore = fopen("falling.sdr", "w"); fclose(highscore); return; } i = 0; while ((x = fgetc(highscore)) != EOF) { x -= 48; BinaryNum[i] = x; i++; } for (i = 15, x = 0; i >= 0; i--, x++) { if (BinaryNum[i] == 1) highscoreint += pow(2, x); } textprintf_ex(activepage, font, 250, 240, makecol(0, 0, 0), -1, "High Score: %i", highscoreint); if (highscoreint < score + totalscore) flag = 1; fclose(highscore); if (flag) { highscore = fopen("falling.sdr", "w+"); if ((score + totalscore) > oldhighscoreint) { highscoreint = oldhighscoreint; highscoreint = score + totalscore; for (i = 15; i >= 0; i--) { PlaceHolder = pow(2, i); if ((highscoreint) >= PlaceHolder) { highscoreint -= PlaceHolder; BinaryNum[i] = 1; } else BinaryNum[i] = 0; } } for (i = 15; i >= 0; i--) fprintf(highscore, "%i", BinaryNum[i]); fclose(highscore); } } void filewrite() { highscoreint = 0; highscore = fopen("falling.sdr", "r"); if (highscore == 0 ) { highscore = fopen("falling.sdr", "w"); fclose(highscore); return; } i = 0; while ((x = fgetc(highscore)) != EOF) { x -= 48; BinaryNum[i] = x; i++; } for (i = 15, x = 0; i >= 0; i--, x++) { if (BinaryNum[i] == 1) highscoreint += pow(2, x); } textprintf_ex(activepage, font, 250, 240, makecol(0, 0, 0), -1, "High Score: %i", highscoreint); if (highscoreint < score + totalscore) flag = 1; fclose(highscore); if (flag) { highscore = fopen("falling.sdr", "w+"); if ((score + totalscore) > oldhighscoreint) { highscoreint = oldhighscoreint; highscoreint = score + totalscore; for (i = 15; i >= 0; i--) { PlaceHolder = pow(2, i); if ((highscoreint) >= PlaceHolder) { highscoreint -= PlaceHolder; BinaryNum[i] = 1; } else BinaryNum[i] = 0; } } for (i = 15; i >= 0; i--) fprintf(highscore, "%i", BinaryNum[i]); fclose(highscore); } } Last edited by CIRCLE; Sep 19th, 2007 at 6:14 PM.

Sep 23rd, 2007, 6:32 PM	#2
CIRCLE Newbie Join Date: May 2007 Posts: 6 Rep Power: 0	With out all the game code this is what it looks like. (Toggle Plain Text) #include <stdio.h> #include <math.h> int BinaryNum[50]; long ExpLoop; long PlaceHolder; long UserNumber; int main() { printf("Give me a Number to Convert to Binary. Up to 65536_\n"); scanf("%i", &UserNumber); for (ExpLoop = 15; ExpLoop > 0; ExpLoop--) BinaryNum[ExpLoop] = 0; for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--) { PlaceHolder = pow(2, ExpLoop); if (UserNumber >= PlaceHolder) { UserNumber -= PlaceHolder; BinaryNum[ExpLoop] = 1; } } for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--) printf("%i", BinaryNum[ExpLoop]); for (ExpLoop = 0; ExpLoop <= 15; ExpLoop++) { if (BinaryNum[ExpLoop] == 1) UserNumber += pow(2, ExpLoop); } printf("\n The Number You used was %i", UserNumber); getch(); return 0; } #include <stdio.h> #include <math.h> int BinaryNum[50]; long ExpLoop; long PlaceHolder; long UserNumber; int main() { printf("Give me a Number to Convert to Binary. Up to 65536_\n"); scanf("%i", &UserNumber); for (ExpLoop = 15; ExpLoop > 0; ExpLoop--) BinaryNum[ExpLoop] = 0; for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--) { PlaceHolder = pow(2, ExpLoop); if (UserNumber >= PlaceHolder) { UserNumber -= PlaceHolder; BinaryNum[ExpLoop] = 1; } } for (ExpLoop = 15; ExpLoop >= 0; ExpLoop--) printf("%i", BinaryNum[ExpLoop]); for (ExpLoop = 0; ExpLoop <= 15; ExpLoop++) { if (BinaryNum[ExpLoop] == 1) UserNumber += pow(2, ExpLoop); } printf("\n The Number You used was %i", UserNumber); getch(); return 0; }

Sep 23rd, 2007, 7:57 PM	#3
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	This seems simpler, plus it checks the input for success, which one should always do: (Toggle Plain Text) #include <iostream> int main (int argc, char* argv[]) { unsigned theNumber; unsigned theLength = sizeof (unsigned) * 8; unsigned mask = 1 << theLength - 1; std::cout << "Enter a number: "; if (scanf ("%d", &theNumber) != 1) { std::cout << "Bad input, dink" << std::endl; return 1; } for (int i = 0; i < theLength; i++) { if (theNumber & mask) std::cout << '1'; else std::cout << '0'; mask >>= 1; } std::cout << endl; return 0; } #include <iostream> int main (int argc, char* argv[]) { unsigned theNumber; unsigned theLength = sizeof (unsigned) * 8; unsigned mask = 1 << theLength - 1; std::cout << "Enter a number: "; if (scanf ("%d", &theNumber) != 1) { std::cout << "Bad input, dink" << std::endl; return 1; } for (int i = 0; i < theLength; i++) { if (theNumber & mask) std::cout << '1'; else std::cout << '0'; mask >>= 1; } std::cout << endl; return 0; } __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

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Programming Forums > Application Development > C

Short Hand Decimal To Binary Vice Versa Good or Bad?