A program for function: Search, Insert, Show, Push, Pop || Array and Stack using Function call

Use this program to run certain function with array and stack. Function: search, insert, show, push and pop. Use a menu to make choice for run operation. I give you a code based on my algorithm. Try to find another algorithm and then make code. Before start learn about Array and Stack and difference between them. #include<stdio.h> #include<stdlib.h> #define max 20 int ARRAY(); int STACK(); int SEARCH(int LA[max], int N); int INSERT(int LA[max], int N); int SHOW(int LA[max], int N); int PUSH(int stk[max], int TOP); int POP(int stk[max], int TOP); int main()     {         char ch;         for(;;)          {             printf("\nMake a choice of your operation:")  ;             printf("\nA: for ARRAY operation");             printf("\nS: for STACK operation");             printf("\nX: for EXIT\n");