Using C-string gives Warning: “Address of stack memory associated with local variable returned”

Question

I am not a C programmer, so I am not that familiar with C-string but now I have to use a C library so here is a shortened version of my code to demonstrate my problem:

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Answer 1

Use heap instead of stack

It's better to allocate memory in heap for this case by using:

int* someDataForParams(void *_params) {

    ...
    int* charCounts = calloc(96, sizeof(char*));
    ...

    return charCounts;
}

96 is just a string length(Just a magic number)