Thread: Problem with string array

Hi,

Im using the code bloks and I have this code and the result is a big character and very rubbish

someone can help me

Thanks

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{

char buffer[8][8];
int a;


strncpy(buffer[0], "   ##   ", 8);
strncpy(buffer[1], "  #  #  ", 8);
strncpy(buffer[2], "#      #", 8);
strncpy(buffer[3], "#      #", 8);
strncpy(buffer[4], "########", 8);
strncpy(buffer[5], "#      #", 8);
strncpy(buffer[6], "#      #", 8);
strncpy(buffer[7], "#      #", 8);

printf("\n valor: %s",&buffer[0][0]);
printf("\n valor: %s",&buffer[1][0]);
printf("\n valor: %s",&buffer[2][0]);
printf("\n valor: %s",&buffer[3][0]);
printf("\n valor: %s",&buffer[4][0]);
printf("\n valor: %s",&buffer[5][0]);
printf("\n valor: %s",&buffer[6][0]);
printf("\n valor: %s",&buffer[7][0]);

    return 0;
}

Result:

Code:

valor:    ##     #  #  #      ##      ##########      ##      ##      #( (
 valor:   #  #  #      ##      ##########      ##      ##      #( (
 valor: #      ##      ##########      ##      ##      #( (
 valor: #      ##########      ##      ##      #( (
 valor: #########      ##      ##      #( (
 valor: #      ##      ##      #( (
 valor: #      ##      #( (
 valor: #      #( (
Process returned 0 (0x0)   execution time : 0.013 s
Press any key to continue.

This happens because 8 bytes aren't enough for those strings, you needs an extra character for the terminator.

char * strncpy ( char * destination, const char * source, size_t num );
Copy characters from string
Copies the first num characters of source to destination. If the end of the source C string (which is signaled by a null-character) is found before num characters have been copied, destination is padded with zeros until a total of num characters have been written to it.

No null-character is implicitly appended at the end of destination if source is longer than num. Thus, in this case, destination shall not be considered a null terminated C string (reading it as such would overflow).