menu_basic.c

#include<stdio.h>//printf puts
#include<string.h>//strcmp()
#include<conio.h>//_getch()
#include<stdlib.h> //system()
int funMENU();
int main()
{
    char uName[20] = { '\0' };
    char passWord[20] = { '\0' };
    int status = 0; // 0 - incorrect u p  1 - correct
    int error_count = 0;

    do {
        system("cls");
        //ask and read uname and password
        printf("please enter your name : ");
        gets_s(uName); //gcc gets() stdio.h
        printf("please enter your password :  ");
        //gets_s(passWord); //gcc gets() stdio.h
        //Enter မခေါက်မချင်း စာလုံးတစ်လုံးချင်းဖတ်ပြီး passWord array ထဲ ထည့်မယ်။
        //အဆုံးမှာ '\0' ထည့်ပေးလိုက်မယ်
        char ch = '\0';
        int i = 0;
        while ((ch = _getch()) != '\r')
        {
            printf("*");
            passWord[i] = ch;
            i++;
        }
        printf("\n");

        //if correct go to fun and exit
        if ((strcmp(uName, "aung") == 0) && (strcmp(passWord, "1234") == 0))
        {
            puts("user name and password are OK!");
            funMENU();
            status = 1;

        }
        else {
            puts("user name and password are NOT OK!");
            status = 0;
            error_count++;
        }
        //else go to do while top

    } while ( ( status==0) && (error_count <3) );



    //_getch();
    return 0;
}

int funMENU()
{
    int ans = 0;
    do {
        printf("1 - Area Calculation\n");
        printf("2 - Gold Price\n");
        printf("3 - Exit\n");
        printf("Please choose (1,2,3) : ");
        scanf_s("%d", &ans);

        if (ans == 1)
        {
            //area
            printf("area function\n");
        }
        else if (ans == 2)
        {
            //gold price
            printf("gold price function\n");
        }
        else if (ans == 3)
        {
            //exiting
            return 0;
        }
        else
        {
            printf("wrong answer, pls try again!");
        }
    } while (ans!=3);


}