通过对simp.cpp的编译和链接后，出现如下错误： Info :Compiling C:\dos\hp34401a\bc20\simp.cpp Info :Linking C:\bc5\bin\simp.exe Error:Error: Unresolved external 'ibfind(char*)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external '_ibsta' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibdev(int,int,int,int,int,int)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external '_iberr' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibonl(int,int)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibwrt(int,char*,long)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibwait(int,int)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibrd(int,char*,long)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external '_ibcntl' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp Error:Error: Unresolved external 'ibloc(int)' referenced from module ..\..\dos\hp34401a\bc20\simp.cpp 以下两行是编写的( *. prj )文件： c:\dos\hp34401a\bc20\simp.cpp c:\dos\hp34401a\bc20\ax4810.lib 以下是资料光盘上的应用例子，在Broland C++ 5.0下对它（simp.cpp）编译和链接后，就出现上面显示的错误， 请问：怎样编写程序才能将AX4810.H和AX4810.LIB链接到应用例子中去呢? /* simple.cpp : Defines the entry point for the console application. */ /* AXIOMTEK AX4810 PCI GPIB CARD SAMPLE PROGRAM */ /* Communicating to HP 34401A DMM */ /* Note: */ /* Before testing, please check the connection between */ /* GPIB card and DMM is ok, and the GPIB address of DMM */ /* should be 2. */ /*#include "stdafx.h"*/ #include <stdlib.h> #include <stdio.h> #include <conio.h> #include <string.h> /*//#include <malloc.h> //#include <memory.h> //#include <direct.h>*/ /*#include <windows.h>*/ #include "c:\dos\hp34401a\bc20\ax4810.h" int TestProc() { int dmm; /*/ file descriptor for digital multimeter*/ int i; char reading[255] = {0}; /*/ stores measurement readings from DMM*/ printf("\n\n\n\nAXIOMTEK Ax4810 PCI GPIB Card Sample Program Begin...\n\n"); ibfind("gpib0"); if(ibsta&ERR) { printf("\n\nAx4810 board installed incorrectly or cann't work!"); printf("\nTest fail!\n\n"); return(0); } if ((dmm = ibdev(0, 2, 0, T100ms, 1, 0x140A)) < 0) /*/ DMM's address is 2*/ { printf("\n\nError %d: %s\n", iberr, "Error of ibdev"); if (dmm != -1) { /*/ printf("Cleanup: taking board off-line\n");*/ ibonl(dmm,0); } printf("\n\nCould not open DMM or could not find Ax4810 board!"); printf("\nTest fail\n\n"); return(0); } /*/ Set up DMM to measure VDC, auto-range*/ ibwrt(dmm, ":conf:volt:dc", 13L); if (ibsta & ERR) printf("\nCould not initialize DMM"); /*/ Take 10 readings*/ for (i=0; i < 10; i++) { /*// Request voltage reading from DMM*/ ibwrt(dmm, ":meas?", 6L); if (ibsta & ERR) printf("\nCould not trigger multimeter"); /*/ Read data from DMM*/ ibwait(dmm,TIMO); /*/ Wait DMM finish reading*/ ibrd(dmm, reading, 20L); if (ibsta & ERR) printf("\nCould not read data from multimeter"); /*/ Null terminate the string*/ reading[ibcntl-1]='\0'; printf("\n\ndata = %s", reading); } /*/ Take DMM off-line*/ ibloc(dmm); ibonl(dmm, 0); printf("\n\n\n\nAx4810 Sample Program End\n\n"); return (0); } void main() { TestProc(); return; }