memory leak

typedef char* String;

String getNth(String str, int n)
{
    int i;
    String temp = malloc(sizeof(char) * MAX_SIZE);
    String regExp = malloc(sizeof(char) * MAX_SIZE);
       
    for(i = 0; i < n; i++)
    {
        if (i == n-1) strcat(regExp, "%s");
        else strcat(regExp, "%*s");
    }

    sscanf(str, regExp, temp);
    free(regExp);
    return temp;
}

this leaks memory (temp). a neat way to prevent this, please.

>>2

Alternatively, you can specify that the variable holding the result be allocated ahead of time:

String getNth(String str, int n, String result) { ... }