How to cut part of a string in c?

Question

I\'m trying to figure out how to cut part of a string in C. For example you have this character string \"The dog died because a car hit him while it was crossing the road\" how

Answer 1

You can use something similar to Python's [n:m] cut operator via a simple code but involves dynamic allocation and also preserve the original string that is an input.

char* cutoff(const char* str, int from , int to)
{
    if (from >= to)
        return  NULL;

    char* cut = calloc(sizeof(char), (to - from) + 1);
    char* begin = cut;
    if (!cut)
        return  NULL;

    const char* fromit = str+from;
    const char* toit = str+to;
    (void)toit;
    memcpy(cut, fromit, to);
    return begin;
}