Question

I have a character array of length 32 and would like to take certain charcters out of it.
for example

111111000000000000000000111111 <32 chars

I would like to take chars 0-6 which would be 111111

Or even take chars 26-31 which would be 111111

char check_type[32];

Above is how I’m declaring.

What I would like to be able to do is define a function or use a function that takes that starting place, and end character.

Ive looked at many ways like using strncpy and strcpy but found no way yet.

Answer 1

Use memcpy.

// Stores s[from..to) in sub.
// The caller is responsible for memory allocation.
void extract_substr(char const *s, char *sub, size_t from, size_t to)
{
    size_t sublen = to - from;
    memcpy(sub, s + from, sublen);
    sub[sublen] = '\0';
}