Question

某段程序，VC2005编译不过，但VC2008就能编译的过

程序的目的是寻找到三边都小于五百的毕达哥拉斯三角。其中的pow函数。我也写了cmath头文件，但是还是会出现一堆错误，比如说：
error C2732: linkage specification contradicts earlier specification for 'pow'
1> e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(489) : see declaration of 'pow'
1>e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(490) : warning C4244: 'argument' : conversion from 'double' to 'int', possible loss of data
1>e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(526) : error C2556: 'float pow(double,double)' : overloaded function differs only by return type from 'double pow(double,double)'
1> e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(123) : see declaration of 'pow'
1>e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(526) : error C2371: 'pow' : redefinition; different basic types
1> e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(123) : see declaration of 'pow'
1>e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(526) : warning C4244: 'argument' : conversion from 'double' to 'float', possible loss of data
1>e:\program files (x86)\microsoft visual studio 8\vc\include\math.h(526) : warning C4244: 'argument' : conversion from 'double' to 'float', possible loss of data
但是在VC2008里面编译就很顺利。
莫非是我的cmath函数库出问题了= =？肿么把它设置回来…………
程序代码如下：

#include<iostream>
#include<cmath>
#include<iomanip>

using namespace std;

int main()
{

cout<<"Side1"<<setw(10)<<"Side2"<<setw(10)<<"Hypotenuse"<<endl;
double hypotenuse;
int counter=0;

for(double Side1=1; Side1<=500; Side1++)
{
for(double Side2=1; Side2<=500; Side2++)
{

hypotenuse=pow((Side2*Side2+Side1*Side1),0.5);

if ((hypotenuse==(int)hypotenuse) && hypotenuse<500)
{
++counter;
cout<<Side1<<setw(4)<<Side2<<setw(4）<<hypotenuse<<endl;
}

}
}
cout<<"A total of "<<counter<<" triples were found"<<endl;
return 0;
}

Answer 1

修改了一处，VC6编译运行可以通过。见注释
================================================
#include<iostream>
#include<cmath>
#include<iomanip>

using namespace std;

int main()
{

cout<<"Side1"<<setw(10)<<"Side2"<<setw(10)<<"Hypotenuse"<<endl;
double hypotenuse;
int counter=0;

for(double Side1=1; Side1<=500; Side1++)
{
for(double Side2=1; Side2<=500; Side2++)
{

hypotenuse=pow((Side2*Side2+Side1*Side1),0.5);

if ((hypotenuse==(int)hypotenuse) && hypotenuse<500)
{
++counter;
cout<<Side1<<setw(4)<<Side2<<setw(4) <<hypotenuse<<endl;//括号问题。setw(4）应该为setw(4)
}

}
}
cout<<"A total of "<<counter<<" triples were found"<<endl;
return 0;
}

追问

虽然您说的是对的……这段放到VC2005还是会报错。但放到2008里编译就通过了……所以我想说我的VC2005是哪里出问题了……

追答

楼主，我用VS2005又试了下，可以正常编译运行，是不是你的VS2005有问题啊，建议重装下。

Answer 2

去下库文件！！包你搞定

追问

库文件……能说的详细点吗？谢谢