C char array insert characters using functions at different stages

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If I have a char array like: char arr[32];

Can I initialize it later on in different functions using arr[0:5] = "00000" and arr[26:31] = "00000"

If not, How can i insert different parts of strings to the char array later on?

you can use memcpy for such purpose

int offset=5;
const char * str="000";
memcpy(arr+offset,str,strlen(str));

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You can use memcpy:

char arr[35];
memcpy(&arr[0], "00000", 5);
memcpy(&arr[30], "00000", 5);

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You can write a separate function that performs the task.

Here is a demonstrative program.

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

char * insert( char *dsn, size_t pos, size_t n, const char *src )
{
    memcpy( dsn + pos, src, n );
    return dsn;
}

int main(void) 
{
    enum { N = 32 };
    char s[N] = "";
    const char *s1 = "AAAAA";
    const char *s2 = "BBBBB";

    puts( insert( s, 0, 5, s1 ) + 0 );

    puts( insert( s, 26, 5, s2 ) + 26 );

    return 0;
}

Its output is

AAAAA
BBBBB

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Comments
  • Yes, you can. You need to write the code possibly using the memcpy function, eg. memcpy(arr + 26, "00000", 5)