c++小白，跪求大佬为我解答疑惑。（下面是我编的代码显示编译错误试了好几遍还是一样的问题）

#include <iostream>
using namespace std;
enum CPU_Rank {P1=1,P2,P3,P4,P5,P6,P7};
class CPU
{
public:
CPU ();
CPU(CPU_Rank r,float f,int v);
~CPU()
void run();
void stop();
private:
CPU_Rank rank;
float frequency;
int valtage;
};
CPU::CPU()
{
rank=P1;
frequency=3.6;
valtage=220;
}
CPU::CPU(CPU_Rank r,float f,int v)
{
rank=r;
frequency=f;
valtage=v;
void CPU::run()
{
cout<<CPU is running<<endl;}
void CPU::stop()
{
cout<<CPU is stopping<<endl;
}
int main()
{
int i;
CPU_Rank r;
float f;
int v;
cin>>i>>f>>v;
r=CPU_Rank(i);
CPU myComputer(r,f,v);
myComputer.run();
myComputer. stop();
return 0;
}