Programming Challenges - A List Post: 302120846

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Top Forums Programming Programming Challenges - A List Post 302120846 by Franklin52 on Friday 8th of June 2007 02:08:45 PM

06-08-2007

Registered User

Quote:

Originally Posted by blowtorch

Challenge: DRAM

Difficulty: Easy to Medium in C, Easy in perl/python

As the problem says, the value of the palindrome may exceed your system's defined integer size in C/C++.

My trial:

Code:

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

void palindrome(char *p, int value);

int main (int argc, char *argv[])
{
    int val[20];
    int i, n;
    char pal[20];

    n = 0;

    while (n < 20) {
        scanf("%d", &val[n]);
	if(val[n] == -1) {
	    break;
	}
	n++;
    }
    
    for(i = 0; i < n; i++) {
	pal[0] = '\0';
	palindrome(pal, val[i]);

	if(pal[0]) {
	    printf("Initial value: %d gives palindrome %s\n",val[i], pal);
        }
        else {
	    printf("Initial value: %d no palindrome found\n",val[i]);
        }
    }

    return(0);
}

void palindrome(char *p, int value)
{
    long pal;
    char str[20], rts[20];
    int i, j, len, nel; 

    pal = value;

    for(j = 0; j < 1000; j++) {
        sprintf(str, "%d", pal); 
	len = strlen(str);
        nel = len-1;

	for(i = 0; i < len; i++) {
	    rts[i] = str[nel];
	    nel--;
        }
	rts[len] = '\0';
        nel = len/2;

	if(!strncmp(str, rts, nel)) {
	    strcpy(p, str);    
	    return;
	}
	pal = pal + strtol(rts, 0, 0);
    }
    p[0] = '\0';
}

Regards

Franklin52

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LEARN ABOUT FREEBSD

dwarf_get_ds_name

DWARF_GET_AT_NAME(3)					   BSD Library Functions Manual 				      DWARF_GET_AT_NAME(3)

NAME

     dwarf_get_ACCESS_name, dwarf_get_AT_name, dwarf_get_ATE_name, dwarf_get_CC_name, dwarf_get_CFA_name, dwarf_get_CHILDREN_name,
     dwarf_get_DS_name, dwarf_get_DSC_name, dwarf_get_EH_name, dwarf_get_END_name, dwarf_get_FORM_name, dwarf_get_ID_name, dwarf_get_INL_name,
     dwarf_get_LANG_name, dwarf_get_LNE_name, dwarf_get_LNS_name, dwarf_get_MACINFO_name, dwarf_get_OP_name, dwarf_get_ORD_name,
     dwarf_get_TAG_name, dwarf_get_VIRTUALITY_name, dwarf_get_VIS_name -- retrieve the symbolic names of DWARF constants

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_ACCESS_name(unsigned val, char **str);

     int
     dwarf_get_AT_name(unsigned val, char **str);

     int
     dwarf_get_ATE_name(unsigned val, char **str);

     int
     dwarf_get_CC_name(unsigned val, char **str);

     int
     dwarf_get_CFA_name(unsigned val, char **str);

     int
     dwarf_get_CHILDREN_name(unsigned val, char **str);

     int
     dwarf_get_DS_name(unsigned val, char **str);

     int
     dwarf_get_DSC_name(unsigned val, char **str);

     int
     dwarf_get_EH_name(unsigned val, char **str);

     int
     dwarf_get_END_name(unsigned val, char **str);

     int
     dwarf_get_FORM_name(unsigned val, char **str);

     int
     dwarf_get_ID_name(unsigned val, char **str);

     int
     dwarf_get_INL_name(unsigned val, char **str);

     int
     dwarf_get_LANG_name(unsigned val, char **str);

     int
     dwarf_get_LNE_name(unsigned val, char **str);

     int
     dwarf_get_LNS_name(unsigned val, char **str);

     int
     dwarf_get_MACINFO_name(unsigned val, char **str);

     int
     dwarf_get_OP_name(unsigned val, char **str);

     int
     dwarf_get_ORD_name(unsigned val, char **str);

     int
     dwarf_get_TAG_name(unsigned val, char **str);

     int
     dwarf_get_VIRTUALITY_name(unsigned val, char **str);

     int
     dwarf_get_VIS_name(unsigned val, char **str);

DESCRIPTION

     These functions return the symbolic name of a numeric DWARF constant.

     Argument val specifies the numeric value whose symbolic name is desired.

     Argument str should point to a location which will hold the returned NUL-terminated string containing the symbolic name of the specified
     value.

     The list of functions and the DWARF constants that they accept are:

     dwarf_get_ACCESS_name()	  DW_ACCESS_* constants.
     dwarf_get_AT_name()	  DW_AT_* constants.
     dwarf_get_ATE_name()	  DW_ATE_* constants.
     dwarf_get_CC_name()	  DW_CC_* constants.
     dwarf_get_CFA_name()	  DW_CFA_* constants.
     dwarf_get_CHILDREN_name()	  DW_CHILDREN_* constants.
     dwarf_get_DS_name()	  DW_DS_* constants.
     dwarf_get_DSC_name()	  DW_DSC_* constants.
     dwarf_get_EH_name()	  DW_EH_PE_* constants.
     dwarf_get_END_name()	  DW_END_* constants.
     dwarf_get_FORM_name()	  DW_FORM_* constants.
     dwarf_get_ID_name()	  DW_ID_* constants.
     dwarf_get_INL_name()	  DW_INL_* constants.
     dwarf_get_LANG_name()	  DW_LANG_* constants.
     dwarf_get_LNE_name()	  DW_LNE_* constants.
     dwarf_get_LNS_name()	  DW_LNS_* constants.
     dwarf_get_MACINFO_name()	  DW_MACINFO_* constants.
     dwarf_get_OP_name()	  DW_OP_* constants.
     dwarf_get_ORD_name()	  DW_ORD_* constants.
     dwarf_get_TAG_name()	  DW_TAG_* constants.
     dwarf_get_VIRTUALITY_name()  DW_VIRTUALITY_* constants.
     dwarf_get_VIS_name()	  DW_VIS_* constants.

RETURN VALUES

     These functions return DW_DLV_OK on success. If the DWARF constant denoted by argument val is not recognized, these function return
     DW_DLV_NO_ENTRY.

SEE ALSO

     dwarf(3)

BSD
								  April 22, 2011							       BSD