Thread: Undefined reference to 'Printf' ????

I am writing a program for my C programming class that is supposed to have basic ATM functions, but the problem is when I compile I get an error message saying "Undefined reference to 'Printf'." I have checked my printf statements and cannot find the problem. If anyone could help me out it would be much appreciated. Thanks

Code:

#include <stdio.h>


#define SCREEN_HEIGHT 80    // Number of newlines to print out
#define MAXLINE 100         // Maximum user input characters


// Function prototypes
void displayMenu(void);
float checkBalance(int acctNum);
int getAccountIndex(int acctNum);
int transferFunds(int acct1, int acct2,float amt);
int withdrawCash(int acctNum, int amt);
int getline(char s[], int lim);
void printError(char errNo);


// Global List of account numbers
int accountList[] =   {1234,   5289,    8744,  6912,  3421,   9658,  1487,  1147,     5732};


// Global List of corresponding balances for each account (in same order of account number above)
float balanceList[] = {4798.32,19628.89,150.78,100.00,6742.00,874.05,543.91,578963.45,8943.12};


int main()
{
    int accountNumber;
    char line[MAXLINE];
    double atof(char []);
    int i;
    int c;
    char userInput;


    // Get the persons account number (like putting in a debit card)
    printf("Please enter your account number: ");
    getline(line,MAXLINE);
    accountNumber = atof(line);


    if (accountNumber != accountList[i])
        {
            printError(-12);
        }
    do
    {
        displayMenu();      // read menu option using getline and atof functions
        getline(line, MAXLINE);
        int menuOption = atof(line);
        switch(menuOption)
            {
                case 1:
                    checkBalance(accountNumber);
                break;
                case 2:
                    printf("Please enter the Account Number to transfer to");


                    getline(line,MAXLINE);
                    int x = atof(line);


                    printf("How much would you like to transfer?");


                    getline(line,MAXLINE);
                    int y = atof(line);


                    float z = transferFunds(accountNumber, x, y);
                    if (z != 0)
                        printError(z);
                    break;


                case 3:
                    Printf("How much would you like to Withdraw?");


                    getline(line, MAXLINE);
                    int a = atof(line);


                    float b = withdrawCash(x,y);


                    if (b < 0)
                        printError(a);
                    else
                        printf("Cash despensing complete!");
                    break;


                default:
                    printf("Error");
                    break;
            }






    } while (userInput != 4);


    return 0;   // Assume successful completion of program if we made it here
}


/* displayMenu:  display the menu options */
void displayMenu(void)
{
    int j;
    char userInput;
    // Clear out the screen contents
    for(j=0;j<=SCREEN_HEIGHT;j++)
        printf("\n");


    // Print the Menu Options


        printf("1. Check Balance\n");
        printf("2. Transfer Funds\n");
        printf("3. Withdraw Cash\n");
        printf("4. Exit\n");
}






/* checkBalance:  return the balance of the specified account */
float checkBalance(int acctNum)
{
    int x;
    x = getAccountIndex(acctNum);
    return balanceList[x];
}


/* getAccountIndex:  get the array index for the specified account */
int getAccountIndex(int acctNum)
{
    int i;
    for (i=0; i< sizeof(accountList)/sizeof(int); i++)
        {
            if (acctNum == accountList[i]) // make sure account number is on the list
                {
                    return i;
                }
        }
    return -1;
}


/* transferFunds:  transfer funds from acct1 to acct2 in the amount of amt */
int transferFunds(int acct1, int acct2, float amt)
{
    int i;
    int x;
    int y;
    float newBalance1;
    float newBalance2;


    x = getAccountIndex(acct1); // get each of the account indices.
    y = getAccountIndex(acct2);


    if (acct1 < amt) // verify there is enough money in account
        return -11;
    if (acct2 != accountList[i]) // make sure the account exists
        return -12;


    newBalance1 = acct1 + amt;
    newBalance2 = acct2 - amt;


    return 0;


}


/* withdrawCash:  deduct amount from account and show message for dispensing */
int withdrawCash(int acctNum, int amt)
{
    int newBalance;
    int x;


    x = getAccountIndex(acctNum);


    if (acctNum < amt) // make sure the account has enough money in it
        return -11;


    // Debit the amount from the account and print dispensing cash
    newBalance = acctNum - amt;
    printf("\nDispensing Cash...\n");


    return 0;
}


/* atof: convert string s to double */
double atof(char s[])
{
    double val, power;
    int i, sign;


    for( i=0; isspace(s[i]); i++)   /* skip white space */
        ;
    sign = (s[i] == '-') ? -1 : 1;


    if( s[i] == '+' || s[i] == '-')
        i++;
    for( val=0.0; isdigit(s[i]);i++)
        val = 10.0 * val + (s[i]-'0');
    if( s[i] =='.')
        i++;
    for( power=1.0; isdigit(s[i]); i++)
    {
        val = 10.0 * val + (s[i]-'0');
        power *= 10.0;
    }


    return sign * val/power;
}


/* getline: get line into s, return length */
int getline(char s[], int lim)
{
    int c,i;
    i=0;


    while( --lim > 0 && (c=getchar()) != EOF && c!= '\n')
    {
        s[i++] = c;
    }


    if(c == '\n')
    {
        s[i++] = c;
    }


    s[i] = '\0';


    return i;
}


/* printError: print the corresponding error message */
void printError(char errNo)
{
    // Based on input, print appropriate error message
    switch(errNo)
    {
        case -11:   printf("I'm sorry, you do not enough money to handle this transfer.\n");


        case -12:   printf("I'm sorry, the account number you entered does not exist.\n");


        case -13:   printf("Menu Options INVALID\n");


        default:    // Print a generic error for anything else calling this function
            printf("ERROR\n");
            break;
    }
}