# include 
using namespace std; 
Void InitMatrix (int * *, int, int). 
Int * * Multiply (int * *, int * *, int, int, int, int). 
Void the Display (int * *); 
Int main () 
{const int n=2; 
Const int k=3; 
Const int m=4; 
Int a [n] [k], b [k] [m]. 
Int * * c;//please add the definition of c 
InitMatrix (a, n, k);//initialization matrix a 
InitMatrix (b, k, m);//initialization matrix b 
C=Multiply (a, b, n, k, k, m);//calculate aXb 
The Display (c);//output calculation results 
return 0; 
} 
Void InitMatrix (int * * x, int q, int p) 
{
Int I, j; 
Int * * x; 
X=new int * [q]; 
for(i=0; I[I] x=new int [p]. 
for(i=0; Ifor(j=0; JCin> [I] x [j]; 
} 
Int * * Multiply (int * * a, b, int * * int n, int k, int l, int m) 
{
Int I, j; 
Int * * c; 
C=new int * [n]. 
for(i=0; I[I] c=new int [m]. 
for(i=0; Ifor(j=0; JFor (int x=0; xFor (int y=0; Y[I] [j] + c=a [I] [x] + b [y] [j]; 
Return the c; 
} 
Void the Display (int * * c) 
{
Cout} 

CodePudding user response:

Because array and two-dimensional pointer is not equivalent relation
You can use a 2 d array pointer to "simulation", but the array itself can be understood as a kind of "type", he has the length of one dimensional attribute, and two-dimensional pointer is not

CodePudding user response:

 # include 

using namespace std; 

Void InitMatrix (int * * *, int, int). 
Int * * Multiply (int * *, int * *, int, int, int, int). 
Void the Display (int * *); 

Int main () 
{
Const int n=2; 
Const int k=2; 
Const int m=2; 
//int a [n] [k], [k] [m]. B 
Int a, * * * * b; 

Int * * c;//please add the definition of c 
InitMatrix (& amp; A, n, k);//initialization matrix a 
InitMatrix (& amp; B, k, m);//initialization matrix b 
C=Multiply (a, b, n, k, k, m);//calculate aXb 
The Display (c);//output calculation results 
return 0; 
} 
* * x//void InitMatrix (int, int q, int p) 
* * * void InitMatrix (int x, int q, int p) 
{
Int I, j; 
Int * * TMP; 
TMP=new int * [q]; 
for(i=0; ITMP [I]=new int [p]. 
for(i=0; Ifor(j=0; JCin> TMP [I] [j]; 
* x=TMP; 
} 
Int * * Multiply (int * * a, b, int * * int n, int k, int l, int m) 
{
Int I, j; 
Int * * c; 
C=new int * [n]. 
for(i=0; I[I] c=new int [m]. 
for(i=0; Ifor(j=0; JFor (int x=0; xFor (int y=0; Y[I] [j] + c=a [I] [x] + b [y] [j]; 
Return the c; 
} 
Void the Display (int * * c) 
{
Cout} 

For reference, remove the compiler warnings and error;

To initialize the array, but it is not can use new inside,

CodePudding user response:

Thanks, problem solved