函数指针的问题

[Kotoya]

要求是使用函数指针 显示两个矩阵 1 2 3 和 2 4 6 并将他们相加 4 5 6 8 10 12



#include <iomanip>
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
using std::setw;

const int m = 2;int i,j;
const int n = 3;
void Fnc1();
void Fnc2();
void sum(float (*pf1)(),float (*pf2)(),float (*pf3)());

main()
{
static float y[m][n]={0,0,0,0,0,0};
static float A[m][n]={1,2,3,4,5,6};
static float B[m][n]={2,4,6,8,10,12};
cout<<"Fnc1()为："<<endl;
Fnc1();
cout<<"Fnc2(为："<<endl;
Fnc1();
cout<<"sum为"<<endl;
sum(Fnc1,Fnc2,y);
getchar();
}

float * Fnc1()
{
for ( i=0;i<m;i++)
{ for( j=0;j<n;j++)
cout<<setw(5)<<A[i][j];
cout<<endl;
}

return A;
}

float * Fnc2()
{
for ( i=0;i<m;i++)
for( j=0;j<n;j++)
cout<<setw(5)<<B[i][j];
cout<<endl;
return B;
}

void sum(float (*pf1)(),float (*pf2)(),float * y)
{
float * cA;
float * cB;
cA = pf1();
cB = pf2();

for(i=0;i<m;i++)
for(j=0;j<n;j++)
y[i][j]=cA[i][j]+cB[i][j];
return;

for ( i=0;i<m;i++)
for( j=0;j<n;j++)
cout<<setw(5)<<y[i][j];
cout<<endl;
}
调试不对~ 大家帮我改改

[liao2001]

是编译都应该不能过！

void Fnc1();
void Fnc2();
void sum(float (*pf1)(),float (*pf2)(),float (*pf3)());

float * Fnc1()
float * Fnc2()
void sum(float (*pf1)(),float (*pf2)(),float * y)

sum(Fnc1,Fnc2,y);

算法是你自己的事，其他的看清楚这几行就够了

[picake]

没有必要用指针函数，我改了你的程序，调通了。

#include <iomanip>
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
using std::setw;

const int m = 2;int i,j;
const int n = 3;
//void Fnc1();
//void Fnc2();
//void sum(float (*pf1)(),float (*pf2)(),float (*pf3)());
static float y[m][n]={0,0,0,0,0,0};
static float A[m][n]={1,2,3,4,5,6};
static float B[m][n]={2,4,6,8,10,12};
void Fnc1()
{
for ( i=0;i<m;i++)
{ for( j=0;j<n;j++)
cout<<setw(5)<<A[i][j];
cout<<endl;
}


}

void Fnc2()
{

for ( i=0;i<m;i++)
{ for( j=0;j<n;j++)
cout<<setw(5)<<B[i][j];
cout<<endl;
}

}
void sum()
{
/*
float * cA;
float * cB;
cA = pf1();
cB = pf2();
*/
for(i=0;i<m;i++)
for(j=0;j<n;j++)
y[i][j]=A[i][j]+B[i][j];

for ( i=0;i<m;i++)
for( j=0;j<n;j++)
{ cout<<setw(5)<<y[i][j];
cout<<endl;
}

}



void main()
{

cout<<"Fnc1()为："<<endl;
Fnc1();
cout<<"Fnc2()为："<<endl;
Fnc2();
cout<<"sum为"<<endl;
sum();
getchar();

}