StarDestroyer.Net BBS

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$ g++ -Wall -W -s -pedantic-errors assign1warmup.cpp 

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assign1warmup.cpp: In function ‘int Hash(std::string, int)’:
assign1warmup.cpp:37: warning: comparison between signed and unsigned integer expressions
/tmp/ccvo6keq.o: In function `main':
assign1warmup.cpp:(.text+0x100): undefined reference to `GetLine()'
collect2: ld returned 1 exit status

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/*
 * Program: warmup.cpp
 * --------------------
 * Program used to generate a hash code based on user's name.
 * As given, this code has two compiler errors you need to track down 
 * and fix in order to get the program up and running.
 *
 * jzelenski Thu Apr  1 12:27:53 PST 2004
 */

#include <iostream>
#include "genlib.h"
#include "simpio.h"

using namespace std;

#define MAX_HASH_CODE	10000	// Upper bound for hash codes generated by program

/* Function prototypes */

int Hash(string s, int maxCode);


/*
 * Function: Hash
 * Usage: hash_number = Hash(key, max_hash);
 * -----------------------------------------
 * This function takes the key and uses it to derive a hash code,
 * which is an integer in the range [0, maxCode - 1].  The hash
 * code is computed using a method called linear congruence.
 */
#define Multiplier -1664117991L		// Multiplier used in Hash function

int Hash(string s, int maxCode)
{
    unsigned long hashcode = 0;
    for (int i = 0; i < s.length(); i++) 
        hashcode = hashcode * Multiplier + s[i];
   return (hashcode % maxCode);
}

int main ()
{
	cout << "Please enter your name: ";
	string name = GetLine();
	
	int hashcode = Hash(name, MAX_HASH_CODE);
	cout << "The hash code for your name is " << hashcode << "." <<endl;

	return 0;
}

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#ifndef GENLIB_H_
#define GENLIB_H_

/* 
 * File: genlib.h
 * Version: 1.0CPP
 * Last modified on Wed Sep 18 13:41:31 PDT 2002 by jzelenski
 * ----------------------------------------------------------
 * This header file is indicated to be included in
 * all the programs written for CS106B/X and provides a few
 * common definitions. Note this header has a "using namespace std" 
 * clause. If a file includes this header, it can then use
 * features from the std namespace without qualifying by scope. 
 */

#include <string>
using namespace std;

/*
 * Function: Error
 * Usage: Error(msg)
 * ------------------
 * Error outputs an error string to the cerr stream and
 * then throws a string exception corresponding to the error.
 */

void Error(string str);


/*
 * Function macro: main
 * --------------------
 * The purpose of this macro definition is to rename the student
 * main to Main in order to allow a custom main defined in our
 * libraries to configure the application before passing control
 * back to the student program.
 */
#ifdef __APPLE__
#define main Main
#endif

#endif /*GENLIB_H_*/

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#ifndef SIMPIO_H_
#define SIMPIO_H_
/*
 * File: simpio.h
 * Version: 1.0CPP
 * Last modified on Wed Sep 18 13:34:29 PDT 2002 by jzelenski
 * ----------------------------------------------------------
 * This interface provides access to a simple package of
 * functions that simplify the reading of console input.
 */

#include "genlib.h"

/*
 * Function: GetInteger
 * Usage: n = GetInteger();
 * ------------------------
 * GetInteger reads a line of text from standard input and scans
 * it as an integer.  The integer value is returned.  If an
 * integer cannot be scanned or if more characters follow the
 * number, the user is given a chance to retry.
 */
 
int GetInteger();


/*
 * Function: GetLong
 * Usage: n = GetLong();
 * ---------------------
 * GetLong reads a line of text from standard input and scans
 * it into a long integer.  The long is returned.  If the 
 * number cannot be scanned or if extra characters follow it,
 * the user is given a chance to retry.
 */
 
long GetLong();

/*
 * Function: GetReal
 * Usage: x = GetReal();
 * ---------------------
 * GetReal reads a line of text from standard input and scans
 * it as a double.  If the number cannot be scanned or if extra
 * characters follow after the number ends, the user is given
 * a chance to reenter the value.
 */

double GetReal();


/*
 * Function: GetLine
 * Usage: s = GetLine();
 * ---------------------
 * GetLine reads a line of text from standard input and returns
 * the line as a string.  The newline character that terminates
 * the input is not stored as part of the string that is returned.
 */
 
string GetLine();

#endif /*SIMPIO_H_*/

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   cout << "Please enter your name: ";
   string name = GetLine();

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   cout << "Please enter your name: " << endl;
string name;
   cin >> name

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$ g++ assign1warmup.cpp -L. -lcs106

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./libcs106.a: file not recognized: File format not recognized
collect2: ld returned 1 exit status