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POIncluding header files in Xcode 4
 

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    <p>I'm going over the Stanford CS106B online course, and created a folder /usr/local where I put the header files for the course. However, whenever I call the header files I run into problems. Take this, for instance. When I try to compile it, I get the error , but RandomChance(double n) is a function in the header file random.h. Help!</p> <p>Undefined symbols for architecture x86_64: "RandomChance(double)", referenced from: flipCoin() in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)</p> <p>The program is below:</p> <pre><code>#include &lt;iostream&gt; #include &lt;string&gt; #include "/usr/local/random.h" using namespace std; string flipCoin(); string flipCoin() { if (RandomChance(0.50)) { return "heads"; } else { return "tails"; } } int main (int argc, const char * argv[]) { cout &lt;&lt; "Enter number of votes" &lt;&lt; endl; cout &lt;&lt; "Enter percentage spread between candidates" &lt;&lt; endl; cout &lt;&lt; "Enter voting error percentage" &lt;&lt; endl; return 0; } </code></pre> <p>This is random.h</p> <pre><code>/* * Function: Randomize * Usage: Randomize(); * ------------------- * This function sets the random seed so that the random sequence * is unpredictable. If this function is not called, the other * functions will return the same values on each run. During the * debugging phase, it is best not to call this function, so that * program behavior is repeatable. */ void Randomize(); /* * Function: RandomInteger * Usage: n = RandomInteger(low, high); * ------------------------------------ * This function returns a random integer in the range low to high, * inclusive. */ int RandomInteger(int low, int high); /* * Function: RandomReal * Usage: d = RandomReal(low, high); * --------------------------------- * This function returns a random real number in the half-open * interval [low .. high), meaning that the result is always * greater than or equal to low but strictly less than high. */ double RandomReal(double low, double high); /* * Function: RandomChance * Usage: if (RandomChance(p)) . . . * --------------------------------- * The RandomChance function returns true with the probability * indicated by p, which should be a floating-point number between * 0 (meaning never) and 1 (meaning always). For example, calling * RandomChance(.30) returns true 30 percent of the time. */ bool RandomChance(double p); #endif /*RANDOM_H_*/ </code></pre> <p>UPDATE: So it worked, and then I added another library by doing <code>#include simpio.h</code> and the whole thing went haywire. It showed 38 errors, including the following.</p> <pre><code>Ld /Users/alexandermoreno/Library/Developer/Xcode/DerivedData/voting-ccwjagcijcytcigfgxvxyiaplsxm/Build/Products/Debug/voting normal i386 cd "/Users/alexandermoreno/Documents/Paradigms/assignment 1/voting" setenv MACOSX_DEPLOYMENT_TARGET 10.7 /Developer/usr/bin/clang++ -arch i386 -isysroot /Developer/SDKs/MacOSX10.7.sdk -L/Users/alexandermoreno/Library/Developer/Xcode/DerivedData/voting-ccwjagcijcytcigfgxvxyiaplsxm/Build/Products/Debug -F/Users/alexandermoreno/Library/Developer/Xcode/DerivedData/voting-ccwjagcijcytcigfgxvxyiaplsxm/Build/Products/Debug -filelist /Users/alexandermoreno/Library/Developer/Xcode/DerivedData/voting-ccwjagcijcytcigfgxvxyiaplsxm/Build/Intermediates/voting.build/Debug/voting.build/Objects-normal/i386/voting.LinkFileList -mmacosx-version-min=10.7 -lcs106 -o /Users/alexandermoreno/Library/Developer/Xcode/DerivedData/voting-ccwjagcijcytcigfgxvxyiaplsxm/Build/Products/Debug/voting Undefined symbols for architecture i386: "___CFConstantStringClassReference", referenced from: CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) CFString in libcs106.a(mainwrapper.o) ... "_NSApp", referenced from: +[Glue showAbout:] in libcs106.a(mainwrapper.o) TerminateApp() in libcs106.a(mainwrapper.o) +[NSBundleWithoutSpuriousErrorLog aloadNibNamed:owner:] in libcs106.a(mainwrapper.o) _main in libcs106.a(mainwrapper.o) -[ConsoleTextView keyDown:] in libcs106.a(ConsoleTextView.o) +[Glue showAbout:] in libcs106.a(mainwrapper.o) TerminateApp() in libcs106.a(mainwrapper.o) +[NSBundleWithoutSpuriousErrorLog aloadNibNamed:owner:] in libcs106.a(mainwrapper.o) _main in libcs106.a(mainwrapper.o) -[ConsoleTextView keyDown:] in libcs106.a(ConsoleTextView.o) "_objc_msgSendSuper", referenced from: +[NSBundleWithoutSpuriousErrorLog aloadNibNamed:owner:] in libcs106.a(mainwrapper.o) -[ConsoleTextView initWithFrame:] in libcs106.a(ConsoleTextView.o) -[ConsoleTextView setFont:] in libcs106.a(ConsoleTextView.o) -[ConsoleTextView dealloc] in libcs106.a(ConsoleTextView.o) -[ConsoleTextView keyDown:] in libcs106.a(ConsoleTextView.o) -[ConsoleTextView rangeForUserTextChange] in libcs106.a(ConsoleTextView.o) "_CFBundleGetInfoDictionary", referenced from: _main in libcs106.a(mainwrapper.o) "_CFBundleCopyBundleURL", referenced from: _main in libcs106.a(mainwrapper.o) "_objc_msgSend", referenced from: +[Glue applicationDidFinishLaunching:] in libcs106.a(mainwrapper.o) +[Glue showAbout:] in libcs106.a(mainwrapper.o) CocoaConsoleResize(int, int, int, int) in libcs106.a(mainwrapper.o) TerminateApp() in libcs106.a(mainwrapper.o) SetConsoleSize(int, int, int, bool) in libcs106.a(mainwrapper.o) patched_read(void*, char*, int) in libcs106.a(mainwrapper.o) CreateMenuWithItems(NSString*, menuitem*, int) in libcs106.a(mainwrapper.o) ... "_CFURLCreateCopyDeletingLastPathComponent", referenced from: _main in libcs106.a(mainwrapper.o) "_CFURLGetFileSystemRepresentation", referenced from: _main in libcs106.a(mainwrapper.o) "_CFBundleGetMainBundle", referenced from: _main in libcs106.a(mainwrapper.o) "Main()", referenced from: +[Glue studentMain] in libcs106.a(mainwrapper.o) "_CFRelease", referenced from: _main in libcs106.a(mainwrapper.o) "_NSFileHandleDataAvailableNotification", referenced from: -[ConsoleTextView registerForNotifications] in libcs106.a(ConsoleTextView.o) "_NSForegroundColorAttributeName", referenced from: -[ConsoleTextView setFont:] in libcs106.a(ConsoleTextView.o) "_NSFontAttributeName", referenced from: -[ConsoleTextView setFont:] in libcs106.a(ConsoleTextView.o) +[ConsoleTextView contentSizeForPointSize:numRows:numCols:] in libcs106.a(ConsoleTextView.o) "_NSBeep", referenced from: -[ConsoleTextView keyDown:] in libcs106.a(ConsoleTextView.o) "_objc_msgSend_fpret", referenced from: +[ConsoleTextView contentSizeForPointSize:numRows:numCols:] in libcs106.a(ConsoleTextView.o) "_objc_msgSend_stret", referenced from: -[ConsoleTextView setPointSize:numRows:numCols:center:] in libcs106.a(ConsoleTextView.o) +[ConsoleTextView contentSizeForPointSize:numRows:numCols:] in libcs106.a(ConsoleTextView.o) +[ConsoleTextView createConsoleInWindow] in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSThread", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSAutoreleasePool", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSDictionary", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSString", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSMenu", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSMenuItem", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSBundle", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) .objc_class_name_NSBundleWithoutSpuriousErrorLog in libcs106.a(mainwrapper.o) (maybe you meant: .objc_class_name_NSBundleWithoutSpuriousErrorLog) ".objc_class_name_NSApplication", referenced from: pointer-to-literal-objc-class-name in libcs106.a(mainwrapper.o) ".objc_class_name_NSObject", referenced from: .objc_class_name_Glue in libcs106.a(mainwrapper.o) ".objc_class_name_NSAttributedString", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSMutableDictionary", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSFont", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSScroller", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSScreen", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSWindow", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSScrollView", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSColor", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSNotificationCenter", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSFileHandle", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSData", referenced from: pointer-to-literal-objc-class-name in libcs106.a(ConsoleTextView.o) ".objc_class_name_NSTextView", referenced from: .objc_class_name_ConsoleTextView in libcs106.a(ConsoleTextView.o) ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation) </code></pre> <p>and this is the #simpio.h file</p> <pre><code>#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_*/ </code></pre>
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    1. COYou are just copying the headers. What about it's implementation files? What you are getting is a linker error. Check whether the object file of random.cpp is in the default path where the linker is looking.
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    2. COSorry, I'm kind of a noob. There is no random.cpp file, and I don't know what a linker is.
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      1. USmlstudent
    3. COThere is a file cs106lib.a along with all the header files, not sure if I'm supposed to do something with it.
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