Belajar C contoh program menu (coding)

             

#include<stdio.h>

#include<string.h>

int main(){

            char nama[20];

            do{

                        printf("input your name [1..20]:");

                        scanf("%[^\n]s\n",nama);fflush(stdin);

           

            }while(strlen(nama)<1 || strlen(nama) >20);

           

            char addr [100];

            do{

                        printf("Input your address [1..50||must contain \"Street\"] :");

                        scanf("%s",addr);fflush(stdin);

            }while(strlen(addr) <1 || strlen(addr)>50|| strstr(addr,"Street")==NULL);

                        printf("Product list  :\n");

                        printf("1. Powder\n");

                        printf("2. Eye Shadow\n");

                        printf("3. Lip gloss\n");

                        printf("4. Mascara\n");

                        printf("5. Eye Liner\n");

            char prd[100];

            do{

                        printf("Input the product name :");

scanf("%[^\n]s",prd); fflush(stdin);

           

            }while(strcmp(prd,"Powder")!=0

                        && strcmp(prd,"Eye Shadow")!=0

                        && strcmp(prd,"Lip gloss")!=0

                        && strcmp(prd,"Mascara")!=0

                        && strcmp(prd,"Eye Liner")!=0);

            int qty;

            do{

                        printf("Input the quantity of products[1..100] :");

                        scanf("%d",&qty);fflush(stdin);

            }while(qty<1 || qty>100);

            char credit[100];

            int isAngka;

            do{

                        isAngka=1;

                        printf("Input your credit card numbe[14 digit] :");

                        scanf("%s",credit);fflush(stdin);

            }while(strlen(credit)!=14);

           

            getchar();

            return 0;

}