DZone Snippets: char code

Include text files in C source

scvalex (Alexandru Scvortov) — Mon, 01 Oct 2007 10:04:48 GMT

This includes the contents of myfile.txt into the char array text.

Note: This only works if ALL lines in the file are enclosed in "s.

Wrong myfile.txt:
Hello world
Goodbye world

Right myfile.txt:
"Hello world"
"Goodbyle world"
""



char text[] = {

#include "myfile.txt"

}

Read Multidimensional C char Array of Unknown Length

jokeyxero (xero) — Thu, 17 May 2007 00:56:20 GMT

Reading a multidimensional C char array (aka C String array) containing char 0 and terminated with literal zero without knowing length.



char *a[] = { "11", "23", "", "44", "11", "", "16", "36", "", "51", "71", "", "46", "26", "", "14", "68", 0};

int sentinel = 0;

int i = 0;

while ( *(a + i++) != sentinel ) { /* counting away */ }

int aLength = i; // 18, length

int aUbound = i - 1; // 17, index of last element

int aMaxIdx = i - 2; // 16, index of last element where a[i] doesn't cause seg fault

// You now have the lengths so read like normal

Python - getchar()

whitetiger () — Tue, 05 Dec 2006 16:16:53 GMT



import os,sys

import sys

import termios



def getchar():

	'''

	Equivale al comando getchar() di C

	'''



	fd = sys.stdin.fileno()

	

	if os.isatty(fd):

		

		old = termios.tcgetattr(fd)

		new = termios.tcgetattr(fd)

		new[3] = new[3] & ~termios.ICANON & ~termios.ECHO

		new[6] [termios.VMIN] = 1

		new[6] [termios.VTIME] = 0

		

		try:

			termios.tcsetattr(fd, termios.TCSANOW, new)

			termios.tcsendbreak(fd,0)

			ch = os.read(fd,7)



		finally:

			termios.tcsetattr(fd, termios.TCSAFLUSH, old)

	else:

		ch = os.read(fd,7)

	

	return(ch)

Conteo de caracteres

jcongote (John Edgar Congote Calle) — Fri, 22 Sep 2006 20:18:14 GMT

Este pedazo de codigo cuenta los caracteres de un archivo

this code count the chars of a file.



#include 

#include 



int main(int argc, char *argv[])

{

    int cont[257];

    int t;

    FILE *ent;

    

    for (t=0;t<257;t++)

        cont[t]=0;

      

    ent=fopen("input.txt","r");

//    printf("Se abrio el archivo :P\n");

    do {

        t = fgetc(ent);

        cont[t]++;

    } while (!feof(ent));

    fclose(ent);



    for (t=0;t<257;t++){

        printf("Caracter %i se repitio %i veces\n", t, cont[t]);

    }



    

//  system("PAUSE");	

  return 0;

}

Cross platform getch() in python

korakot (Korakot Chaovavanich) — Sat, 26 Nov 2005 14:51:17 GMT

For Unix, it uses sys, tty, termios modules.



import sys, tty, termios

fd = sys.stdin.fileno()

old_settings = termios.tcgetattr(fd)

tty.setraw(sys.stdin.fileno())

ch = sys.stdin.read(1)

For Windows, it uses msvcrt module.



import msvcrt

ch = msvcrt.getch()

See more details and OSX code in this recipe by Danny Yoo.

pascal triangle plotter XD

jonasraoni (Jonas Raoni Soares Silva) — Sat, 02 Jul 2005 03:59:46 GMT



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com



#include 

#include 



#define MAX 16



int main () {

	int unsigned vetor[MAX], grau, i = 0, j, top, left;



	clrscr();



	printf( "Dado o grau, printar o triangulo de pascal\n" );



	while( grau > MAX && printf( "Digite um numero entre 0 e %d para o grau: ", MAX ) && scanf( "%u", &grau ) );

	while( i++ < grau && !( j = 0 ) && printf( "\n" ) )

		while( j < i && ( j == 0 && ( top = left = vetor[j] = 1 ) ? 1 : j > 0 && j < i-1 && ( top = vetor[j] ) && ( vetor[j] = left + top ) && ( left = top ) ? 1 : ( vetor[j] = 1 ) ) && printf( "%-5d", vetor[j] ) && ++j );

	getch();

	return 0;

}

palindrome :D

jonasraoni (Jonas Raoni Soares Silva) — Sat, 02 Jul 2005 03:57:38 GMT



//+ Jonas Raoni Soares Silva

//@ http://jsfromhell.com



#include 



int isPalindromo( char *s ){

	char *s2 = s + strlen( s ) - 1;

	if( !*s )

		return 1;

	while( *s++ == *s2-- && *s );

	return !*s && *( --s ) == *( ++s2 );

}



int main( int argc, char *argv[] ){

	char s[255];



	printf( "Texto:" );

	gets( s );

	printf( "%s \n", isPalindromo( s ) ? "YES" : "NO" );



	system( "pause" );



	return 0;

}