seeking basic level help with cryptlib

Hi,
      I am a beginner and just downloaded the cryptlib 3.3.3 to Ubuntu. I
tried to compile a very basic level code to just to see if the library is
build properly. Below is the code. It worked without errors:

#include<stdio.h>
#include "cryptlib.h"

int main(void){
        cryptInit();
       cryptEnd();
    return 0;
}

I then copy-pasted the sample code in the manual:

#include<stdio.h>
#include "cryptlib.h"

int main(void){
        cryptInit();
    /* Create an envelope for the message */
        cryptCreateEnvelope( &cryptEnvelope, cryptUser, CRYPT_FORMAT_SMIME
);
        /* Push in the message recipient's name */
        cryptSetAttributeString( cryptEnvelope, CRYPT_ENVINFO_RECIPIENT,
                                                        recipientName,
recipientNameLength );
        /* Push in the message data and pop out the signed and encrypted
         result */
        cryptPushData( cryptEnvelope, message, messageSize, &bytesIn );
        cryptFlushData( cryptEnvelope );
        cryptPopData( cryptEnvelope, encryptedMessage, encryptedSize,
                                 &bytesOut );
        /* Clean up */
        cryptDestroyEnvelope( cryptEnvelope );
        cryptEnd();
    return 0;
}

This gives several errors like:

test1.c: In function ‘main’:
test1.c:15: error: ‘cryptEnvelope’ undeclared (first use in this function)
test1.c:15: error: (Each undeclared identifier is reported only once
test1.c:15: error: for each function it appears in.)
test1.c:15: error: ‘cryptUser’ undeclared (first use in this function)
test1.c:18: error: ‘recipientName’ undeclared (first use in this function)
test1.c: error: ‘recipientNameLength’ undeclared (first use in this
function)
test1.c: error: ‘message’ undeclared (first use in this function)
test1.c:21: error: ‘messageSize’ undeclared (first use in this function)
test1.c:21: error: ‘bytesIn’ undeclared (first use in this function)
test1.c:23: error: ‘encryptedMessage’ undeclared (first use in this
function)
test1.c:23: error: ‘encryptedSize’ undeclared (first use in this function)
test1.c:24: error: ‘bytesOut’ undeclared (first use in this function)

It clearly is asking for the values of the variables. Could someone please
help me understand what I must do to get this working. If someone has sample
codes, it would be great if you could share.

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