Parsing '?' in getopt

Question

void display(char * str){
   printf(\"%s: Missing file\\n\", str);
}

int main(int argc, char **argv)
{

    int longIndex, opt = 0;
    const char *optString = \"h?         


        

Answer 1

const char *optString = "h?";

Above line replace with following line

const char *optString = "h\?";

this is the literal of question mark in C language