vc环境下编译c程序的简单问题,高手帮帮忙!
建了一个project:bitreversal
包含三个文件:main.cpp,fft.cpp,bitrev.cpp
由于程序太长,就不粘程序了,只把各个文件中的函数首部说明一下
main:#include <math.h>
#include <stdio.h>
#include "fft.cpp"
main()
{省略}
fft.cpp:
#include <math.h>
#include "bitrev.cpp"
void fft(double *x,double *y,int n)
{}
bitrev.cpp:
#include <malloc.h>
void swap(int i,int j,double z[])
{ double t;
t=z[i];
z[i]=z[j];
z[j]=t;
}
void bitrev(int n,double *x,double y[])
在编译链接时,出现如下错误:
Linking...
fft.obj : error LNK2005: "void __cdecl swap(int,int,double * const)" (?swap@@YAXHHQAN@Z) already defined in bitrev.obj
fft.obj : error LNK2005: "void __cdecl bitrev(int,double *,double * const)" (?bitrev@@YAXHPANQAN@Z) already defined in bitrev.obj
main.obj : error LNK2005: "void __cdecl swap(int,int,double * const)" (?swap@@YAXHHQAN@Z) already defined in bitrev.obj
main.obj : error LNK2005: "void __cdecl bitrev(int,double *,double * const)" (?bitrev@@YAXHPANQAN@Z) already defined in bitrev.obj
main.obj : error LNK2005: "void __cdecl fft(double *,double *,int)" (?fft@@YAXPAN0H@Z) already defined in fft.obj
Debug/bitreversal.exe : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.
bitreversal.exe - 6 error(s), 0 warning(s)
这是怎么回事啊?我遇到过好几次这样的问题了,以前只包含两个文件,就把函数形参*x改为x[],或者相反,改几次就没问题了,但这次实在不行了,改来改去,至少还有3个错误。真的搞不懂啦!