Code: #include<stdio.h> #include<conio.h> #include<stdlib.h> void main() { char name[25]= { 'p','a','n','k','a','j' }; int pin, temp_pin; int ch; float bal_amount, withd_amount; printf("Welcome to SBI ATM\n"); printf("------------------\n\n\n"); printf("HELLO : %s\n\n\n",name); printf("\t\tMain Menu \n\n\n"); printf("1. Withdrawl\t\t"); printf("2. Change Pin\n"); printf("3. Balance Enquiry\t"); printf("4. Exit\n\n\n"); printf("Please Enter Your Pin\n"); scanf("%d",&temp_pin); printf("\n\n\n"); printf("Enter your choice"); scanf("%d",&ch); if(temp_pin==pin) { switch(ch) case 1: printf("enter amount\n"); if(withd_amount<=bal_amount) { bal_amount=bal_amount-withd_amount; printf("Your balance amount is Rs. %f",bal_amount); } else { printf("insufficient balance in account\n"); } break; case 2: printf("please enter old pin\n"); scanf("%d",temp_pin); if(temp_pin==pin) { printf("enter new pin\n"); scanf("%d",temp_pin); pin=temp_pin; printf("pin changed successfully\n"); } else { printf("please enter correct pin\n"); } break; case 3: printf("total amount in your account is Rs. %f\n"bal_amount); break; case 4: printf("thank you for visiting us \n come again\n"); break; case default: printf("please enter correct choice\n"); } else printf("enter the correct pin\n"); getch(); }