error in program????

I am writting this program for my class (basic ATM machine). It compiles and builds with no errors, but when I run it, I get an error just after the first screen, where I enter the choice (1-5)

Any help would be greatful

here is the error:

The instruction at "0x00402978" referenced memory at "0x0000000". The memory could not be written.


and here is the program

Code:

---

#include <iostream.h>
#include <stdlib.h>
#include <stdio.h>

float trans_amount(float);
float save_deposit(float, float);
float check_deposit(float, float);
float save_withd(float, float);
float check_withd(float, float);
void print_msg(int);
int choose_acct(int);
void print_acct_msg(int);
       


int main(int argc, char *argv[])
{

    int option;
    int acct_type;
    float trans_amt;
    float save_bal =200.00;
    float check_bal= 500.00;

    printf("Project 3  ATM machine \n\n");

    while (option != 5) {

          print_msg(1);                                              // function call print_msg
          scanf("%d", option);


          switch (option)
          {
          case 1:                                                    // Deposit
                while ((acct_type !=1) && (acct_type !=2))
                {
                      print_msg(2) ;                                  // choose account
                      acct_type = choose_acct(acct_type);
                      print_acct_msg(acct_type);
                     
                      /
                      printf ("acct_type = %d\n", acct_type);
                      if (acct_type == 1)
                      {
                        save_bal = save_deposit(save_bal, trans_amt);
                       
                        }
                      else
                      check_bal = check_deposit(check_bal, trans_amt);
                     
                      printf (" WENT TO ELSE\n");

                      }

                      acct_type=0;
                      break;


            case 2: // Withdrawal
                while ((acct_type !=1) && (acct_type !=2))
                {
                      print_msg(3);
                      acct_type = choose_acct(acct_type);
                      print_acct_msg(acct_type);
                      trans_amt = trans_amount(trans_amt);
                      printf ("acct_type = %d \n", acct_type);
                      if (acct_type == 1)
                      {
                        save_bal = save_withd(save_bal, trans_amt);

                        }
                      else
                      {
                        check_bal = check_withd(check_bal, trans_amt);
                        printf ("check_bal = %f \n", check_bal);
                        printf ("went to else");
                        }

                        }

                    case 3: // transfer funds
                        print_msg(4);
                        printf ("Which account do you want to transfer from?\n");
                        print_msg(8); // prints the account menu type
                        printf ("Transfet to which account? \n");
                        print_msg(8);
                        trans_amt = trans_amount(trans_amt);
                        break;

                    case 4: // account balances
                          while ((acct_type !=1) && (acct_type != 2))
                          {
                          print_msg(2); // account choices
                          acct_type = choose_acct(acct_type);
                          print_acct_msg(acct_type);
                          }

                          acct_type =0;

                          break;

                      case 5: // end of service
                          print_msg(6);
                          break;


                      default: // Error
                              print_msg(7);
                              break;
                              }// end of switch(option)
                              }// end of while (option !=5)

          printf (" End of Project3 \n\n");
          return 0;


      } // end of main


void print_msg(int msg_num)
{
 switch(msg_num)
 {
 case 1: // prints main
 printf ("DEPOSIT FUNDS enter 1\n\n");
 printf ("Withdraw FUNDS enter 2 \n\n");
 printf ("Transfer FUNDS enter 3 \n\n");
 printf ("Accoutn Balances enter 4 \n\n");
 printf ("To end all transactions enter 5 \n\n");
 break;

 case 2:
 printf ("Deposit funds \n\n");
      break;
 case 3:
 printf ("Withdrawal funds \n\n");
      break;
 case 4:
 printf ("Transfer funds \n\n");
      break;
 case 5:                                                                                                        //line 140
 printf ("Account Balances\n\n");
      break;
 case 6:
 printf ("End all transactions\n\n");
      break;
 case 7:
 printf ("** Error Please make another selection ** \n\n");
      break;
 case 8:
 printf ("for Savings enter 1\n\n");
 printf ("for Checking enter 2\n\n");
      break;
 case 9:
 printf ("Enter transaction amount \n\n");
      break;
 case 10:
 printf ("Savings \n\n");
      break;
 case 11:
 printf ("Checking \n\n");
      break;

      } // end of switch(msg_num)
      return;
      } // end of function print_msg

int choose_acct(int atype)
{
 print_msg(8);
 scanf("%d", atype);
 return (atype);
 }

void print_acct_msg(int atype)
{
 printf ("%d \n", atype);
 switch (atype)
 {
 case 1:
 printf ("Savings");
 break;
 case 2:
 printf ("Checking");
 break;
 default:
 print_msg(7);
 break;

 } // end of switch
 return ;
 } // end of prnt_acct_msg

 float trans_amount(float t_amt)
 {
 print_msg(9);
 scanf("%f", &t_amt);
 printf ("t_amt = %f \n", t_amt);
 return (t_amt);
 }

 float save_deposit(float sbalance, float tamount)
 {
  float new_balance;
  new_balance = sbalance + tamount;
  sbalance = new_balance;
  printf ("new_balance = %f \n", new_balance);
  return (sbalance);
  }

  float check_deposit (float cbalance, float tamount)
  {
  float new_balance;
  new_balance = cbalance + tamount;
  cbalance = new_balance;
  printf ( "new_balance = %f\n", new_balance);
  return (cbalance);
  }

  float save_withd (float sbalance, float tamount)
  {
  float new_balance;
  if (sbalance >= tamount)
  {
    new_balance = sbalance - tamount;
    sbalance = new_balance;
    printf ("new_balance = %f\n", new_balance);
    }
  else
  {
    printf ("Insufficient Funds\n");
    }
    return (sbalance);
    } // end of function save_withd

    float check_withd (float cbalance, float tamount)
    {
    float new_balance;
    if (cbalance >= tamount)
    {
    new_balance = cbalance - tamount;
    cbalance = new_balance;
    printf ("new_balance = %f\n", new_balance);
    }
    else
    {
    printf ("Insufficient Funds\n");
    }
    return (cbalance);
    } // end of function check_withd

---

You have a stray '/' on line 41 to start

and after I fixed that, I got these warnings:

spectre.c: In function `main':
spectre.c:29: warning: format argument is not a pointer (arg 2)
spectre.c: In function `choose_acct':
spectre.c:170: warning: format argument is not a pointer (arg 2)


Now my supper is waiting, so good luck

Took care of the stray...but them I still have the same error as before

:confused: :confused: :confused: :confused:

>>#include <iostream.h>
This is for C++ only. What language are you writing in?

>>scanf("%d", option);
Should be
>>scanf("%d", &option);

>>scanf("%d", atype);
should be
>>scanf("%d", &atype);

Also, from my compiler:

Code:

---

Possible use of 'option' before definition in function main
Possible use of 'acct_type' before definition in function main
Possible use of 'trans_amt' before definition in function main

---

If you're still having trouble, post your latest code and the compiler error messages.

I'm an idiot...
Thanks hammer, I didnt include the & in the scanf's


and the iostream was a typo..

THANKS

... and you fixed the other used " before definition" errors as well, right? ;)