#include<iostream>
using namespace std;
double FKAg(double K[],double Ag[]);
int main()
{ double K[5];double Ag[5];double KAg;
cout<<"Ag[0]=";
cin>>Ag[0];
cout<<"Ag[1]=";
cin>>Ag[1];
cout<<"Ag[2]=";
cin>>Ag[2];
cout<<"Ag[3]=";
cin>>Ag[3];
cout<<"Ag[4]=";
cin>>Ag[4];
cout<<"K[0]=";
cin>>K[0];
cout<<"K[1]=";
cin>>K[1];
cout<<"K[2]=";
cin>>K[2];
cout<<"K[3]=";
cin>>K[3];
cout<<"K[4]=";
cin>>K[4];
KAg=FKAg(K[5],Ag[5]);
cout<<"KAg="<<KAg<<endl;
return 0;
}
double FKAg(double K[],double Ag[])
{ double KAg=0;
for(int k=0;k<=4;k++)
KAg=KAg+K[k]*Ag[k];
return KAg;
}

#include<iostream>
using namespace std;
double FKAg(double K[],double Ag[]);
int main()
{ double K[5];double Ag[5];double KAg;
cout<<"Ag[0]=";
cin>>Ag[0];
cout<<"Ag[1]=";
cin>>Ag[1];
cout<<"Ag[2]=";
cin>>Ag[2];
cout<<"Ag[3]=";
cin>>Ag[3];
cout<<"Ag[4]=";
cin>>Ag[4];
cout<<"K[0]=";
cin>>K[0];
cout<<"K[1]=";
cin>>K[1];
cout<<"K[2]=";
cin>>K[2];
cout<<"K[3]=";
cin>>K[3];
cout<<"K[4]=";
cin>>K[4];
KAg=FKAg(K[5],Ag[5]);------->改为KAg=FKAg(K,Ag);就OK了不!
cout<<"KAg="<<KAg<<endl;
return 0;
}
double FKAg(double K[],double Ag[])
{ double KAg=0;
for(int k=0;k<=4;k++)
KAg=KAg+K[k]*Ag[k];
return KAg;
}

double FKAg(double K[],double Ag[]);
调用此函数时传递的参数是数组指针
也就是首元素的地址

改了之后可以了
太感谢了！

不错啊!!!