Thread: My best C++ Programs

You might want to correct a little bug. If you enter any other char but integers your program enters a huge loop. You might want to enter something that will tell it to crash or return something saying its not numbers the person entered. If i knew how I would tell you hehe. But apart from that its a neat little thing you made there.

to fix the math replace the calculations for the allowance with this:

Code:

		day= (allowance/7.0);
		second= (allowance/7.0/24.0/60.0/60.0);
		minute= (day/24.0/60.0);
		monthly = (allowance*4);
		yearly = (allowance*52);
		decade = (yearly*10);
		hourly = (allowance/7.0/24.0);
		century = (yearly*100);
		mil = (century*10);

also you should not call main from with in your program. Its better to put the whole main function in a while statement.

Nothing like that only that its bad style and for some reason it constitutes a error on Borland 5.2 (standard) so it has to have some negative effect.

why didnt anyone else post their best programs...thats what this was for lol

cuz my programs suck!

all ghetto code~

I've had this for a while, but it's still buggy. I remember that I thought it was neat at the time but I can't for the life of me remember what gave me the idea. Now that I think of it, I may rewrite it and solve the problems as well as update the processing for C++ declarations as well.

Sorry, I don't have any of my best C++ programs that I can post without embarassing myself on this computer. Old stuff from programming classes

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

static int cDecl ( void );
static void readTok ( void );
static void firstIdent ( void );
static void decl ( void );
static void pointers ( void );
static void arrays ( void );
static void args ( void );

struct Token { char tok; char buffer[200]; };
struct Token stack[200];
struct Token curr;
int top = -1;

int main( void )
{
  printf ( "--Universal Declaration Translator--"
           "\n     written by Julienne Walker\n"
           "\nInstructions: Enter a C style\n"
           "declaration at the command line,\n"
           "excluding argument names for \n"
           "functions and ending with a semicolon.\n"
           "\nTo exit the program, type x and hit\n"
           "enter.\n"
           "\nExamples:\n"
           "const char* (*a)(int, char);\n"
           "int func(double *, double);\n"
           "char *a[50];\n"
           "int i;\n\n"
           "$: " );
  while ( 1 ) {
    firstIdent();
    decl();
    printf ( "\n" );
    printf ( "$: " );
  }
  return EXIT_SUCCESS;
}

int cDecl ( void )
{
  char *word = curr.buffer;
  if ( !strcmp ( word, "const" ) ) {
    strcpy ( word, "constant" );
    return 1;
  }
  else if ( !strcmp ( word, "signed" ) ) return 2;
  else if ( !strcmp ( word, "unsigned" ) ) return 2;
  else if ( !strcmp ( word, "char" ) ) return 2;
  else if ( !strcmp ( word, "short" ) ) return 2;
  else if ( !strcmp ( word, "int" ) ) return 2;
  else if ( !strcmp ( word, "long" ) ) return 2;
  else if ( !strcmp ( word, "float" ) ) return 2;
  else if ( !strcmp ( word, "double" ) ) return 2;
  else if ( !strcmp ( word, "void" ) ) return 2;
  else if ( !strcmp ( word, "struct" ) ) return 2;
  else if ( !strcmp ( word, "enum" ) ) return 2;
  else return 3;
}

void readTok ( void )
{
  char *temp = curr.buffer;
  while ( ( *temp = getchar() ) == ' ' ) ;
  if ( *temp == 'x' ) {
    printf ( "Good day\n");
    exit( 0 );
  }
  if ( isalnum ( *temp ) ) {
    while ( isalnum ( *++temp = getchar() ) ) ;
      ungetc ( *temp, stdin );
      *temp = '\0';
      curr.tok = cDecl();
      return;
  } else if ( *temp == '*' ) {
    strcpy ( curr.buffer, "pointer to" );
    curr.tok = '*';
    return;
  }
  curr.buffer[1] = '\0';
  curr.tok = *temp;
  return;
}

void firstIdent ( void )
{
  readTok();
  while ( curr.tok != 3 ) {
    stack[++top] = curr;
      readTok();
  }
  printf ( "%s is a ", curr.buffer );
  readTok();
}

void decl ( void )
{
  if ( curr.tok == '[' ) arrays();
  else if ( curr.tok == '(' ) args();
  pointers();
  while ( top >= 0 ) {
    if ( stack[top].tok == '(' ) {
      stack[top--]; readTok(); decl();
    } else printf ( "%s ", stack[top--].buffer );
  }
}

void pointers ( void )
{ while ( stack[top].tok == '*' ) printf ( "%s ", stack[top--].buffer ); }

void arrays ( void )
{
  while ( curr.tok == '[' ) {
    printf ( "array " );
    readTok();
    if ( isdigit ( curr.buffer[0] ) ) {
      printf ( "0 - %d ", atoi ( curr.buffer ) - 1 );
      readTok();
    }
    readTok();
    printf ( "of " );
  }
}

void args ( void )
{
  printf ( "function that takes a " );
  while ( curr.tok != ')' ) {
    readTok();
    printf ( "%s ", curr.buffer );
    readTok();
    if ( curr.tok == '*' ) printf ( "pointer " );
    if ( curr.tok != ')' ) {
      readTok();
      if ( curr.tok == ',' ) printf ( "and " );
    }
  }
  readTok();
  printf ( "as arguments and returns " );
}

-Prelude

What does that do? could you compile it and attach a zip file with the exe in it LOL, i wanna see what that does, i cant understand half the code...man i cant wait to learn all that

lol my first thread has 420 views already

>What does that do?
It's a declaration translator. If you enter a C style declaration on the command line then the program will give you the english equivalent. Here's some sample output, but the full code is there and you can compile and run it to try it out.

Code:

--Universal Declaration Translator--
     written by Julienne Walker

Instructions: Enter a C style
declaration at the command line,
excluding argument names for 
functions and ending with a semicolon.

To exit the program, type x and hit
enter.

Examples:
const char* (*a)(int, char);
int func(double *, double);
char *a[50];
int i;

$: double *arg(float, int, double);
arg is a function that takes a float and int and double as arguments and returns pointer to double

$: const char *(*arg)(char, char, double);
arg is a pointer to function that takes a char and char and double as arguments and returns pointer to char constant

$: char string[50];
string is a array 0 - 49 of char

$: int i;
i is a int

$: x
Good day
Press any key to continue

There is a small error that I fixed from the code I posted though, simply change the args function to this

Code:

void args ( void )
{
  printf ( "function that takes a " );
  while ( curr.tok != ')' ) {
    readTok();
    printf ( "%s ", curr.buffer );
    readTok();
    if ( curr.tok == '*' ) printf ( "pointer " );
    if ( curr.tok != ')' ) {
      if ( curr.tok == ',' ) printf ( "and " );
    }
  }
  readTok();
  printf ( "as arguments and returns " );
}

-Prelude