#include <stdio.h>#include <stdlib.h>char* menu[] = {	"a - add new record",	"d = delete record",	"q - quit",	NULL,};// int func(int a[]) // a is a pointer to the first element of an array// int func(int* a)  // is the same as the above one// so I think the below one is equal to char** choices);// int getchoice(char* greet, char* choices[]);int getchoice(char* greet, char** choices);int main(){	int choice = 0;	do	{		choice = getchoice("please select an action", menu);		printf("you have chosen: %c/n", choice);	} while(choice != ‘q‘);	exit(0);}int getchoice(char* greet, char** choices)// int getchoice(char* greet, char* choices[]){	int chosen = 0;	int selected;	char** option;	do {		printf("choice: %s/n", greet);		option = choices;		while (*option)		{			printf("%s/n", *option);			option++;		}		// when prog running, when user types ‘a‘ and Enter key, prog see ‘a‘ and	   	// LF(‘/n‘)(10), not the character CR‘/r‘(13), unix and linux use a single		// LF as the end of a line not like in windows it use both the two characters		// but still strange happens, this program runs very well in both linux and 		// windows OS.		do // if I typed ‘a‘ and Enter in shell bash, there will be two characters in		{  // buffer, character ‘a‘(97) and character ‘/n‘(10),			selected = getchar();		} while (selected == ‘/n‘); // discard the ‘/n‘		option = choices;		while (*option)		{			if (selected == *option[0])			{				chosen = 1;				break;			}			option++;		}		if (!chosen)		{			printf("incorrect choice, select again/n");		}	} while (!chosen);	return selected;}

CR LF lp