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//#include<Windows.h>
#include<stdio.h>
#include<math.h>
using namespace std;
 
#define MAX_THREADS 20
DWORD N;
DWORD Array_A[MAX_THREADS][MAX_THREADS];
DWORD Array_B[MAX_THREADS][MAX_THREADS];
DWORD MultipleArray[MAX_THREADS][MAX_THREADS];
void Print()
{
	printf("Result:");
	for (int i = 0; i < N; i++)
	{
		printf("\n");
		for (int j = 0;  j < N;  j++)
			printf("%d   ",MultipleArray[i][j]);
	}
}
/**************************************************/
/**************************************************/
DWORD WINAPI Multiplication(LPVOID Param)
{
	DWORD t,Index =*(DWORD*) Param;
	for (DWORD j = 0; j < N; j++)
	{
		t=0;
		for (DWORD l = 0 ; l < N; l++)
			t+=Array_A[Index][l]*Array_B[l][j];
		MultipleArray[Index][j]=t;
	}
	return 1;
}
/**************************************************/
/**************************************************/
void main(int argc, char *argv[])
{
	DWORD ThreadId[MAX_THREADS];
	HANDLE ThreadHandle[MAX_THREADS];
	int Index[MAX_THREADS];
	if (argc < 3)
	{
		fprintf(stderr, "Multiplication requires at least two input\n");
		return;
	}
	if((argc-1)%2)
	{
		fprintf(stderr, "The number of input data must be paired But now is %d\n",argc-1);
		return;
	}
	int Count=(argc-1)/2;
	N=(int)sqrt(Count*1.0);
	if ((N*N)!=Count)
	{
		fprintf(stderr, "The matrix must be square\n");
		return;
	}
	// Transfer Data For Easier Programming
	for (int i = 0; i < N; i++)
	{
		for (int j = 0; j < N; j++)
		{
			Array_A[i][j]=atoi(argv[(i*N)+j+1]);
			Array_B[i][j]=atoi(argv[(i*N)+j+Count+1]);
		}
	}
	// Create N Threads
	for (int i = 0; i < N; i++)
	{
		 // Generate unique data for each thread to work with.
		Index[i]=i;
		// Create the thread to begin execution on its own.
		ThreadHandle[i] = CreateThread(NULL,0,Multiplication,&Index[i],0,&ThreadId[i]);
		if (ThreadHandle[i]==NULL)
		{
			fprintf(stderr, "Thread could not be created\n");
			ExitProcess(3);
			return;
		}
	}
	// End of main thread creation loop.
	// Wait until all threads have terminated.
	WaitForMultipleObjects(N,ThreadHandle,false,INFINITE);
	// Close all thread handles and free memory allocations.
	for (int i = 0; i < N; i++)
		CloseHandle(ThreadHandle[i]);
	Print();
}

prog.cpp:7:1: error: 'DWORD' does not name a type
 DWORD N;
 ^
prog.cpp:8:1: error: 'DWORD' does not name a type
 DWORD Array_A[MAX_THREADS][MAX_THREADS];
 ^
prog.cpp:9:1: error: 'DWORD' does not name a type
 DWORD Array_B[MAX_THREADS][MAX_THREADS];
 ^
prog.cpp:10:1: error: 'DWORD' does not name a type
 DWORD MultipleArray[MAX_THREADS][MAX_THREADS];
 ^
prog.cpp: In function 'void Print()':
prog.cpp:14:22: error: 'N' was not declared in this scope
  for (int i = 0; i < N; i++)
                      ^
prog.cpp:18:19: error: 'MultipleArray' was not declared in this scope
    printf("%d   ",MultipleArray[i][j]);
                   ^
prog.cpp: At global scope:
prog.cpp:23:1: error: 'DWORD' does not name a type
 DWORD WINAPI Multiplication(LPVOID Param)
 ^
prog.cpp:37:33: error: '::main' must return 'int'
 void main(int argc, char *argv[])
                                 ^
prog.cpp: In function 'int main(int, char**)':
prog.cpp:39:2: error: 'DWORD' was not declared in this scope
  DWORD ThreadId[MAX_THREADS];
  ^
prog.cpp:40:2: error: 'HANDLE' was not declared in this scope
  HANDLE ThreadHandle[MAX_THREADS];
  ^
prog.cpp:45:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   return;
   ^
prog.cpp:50:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   return;
   ^
prog.cpp:53:2: error: 'N' was not declared in this scope
  N=(int)sqrt(Count*1.0);
  ^
prog.cpp:57:3: error: return-statement with no value, in function returning 'int' [-fpermissive]
   return;
   ^
prog.cpp:64:4: error: 'Array_A' was not declared in this scope
    Array_A[i][j]=atoi(argv[(i*N)+j+1]);
    ^
prog.cpp:64:38: error: 'atoi' was not declared in this scope
    Array_A[i][j]=atoi(argv[(i*N)+j+1]);
                                      ^
prog.cpp:65:4: error: 'Array_B' was not declared in this scope
    Array_B[i][j]=atoi(argv[(i*N)+j+Count+1]);
    ^
prog.cpp:74:3: error: 'ThreadHandle' was not declared in this scope
   ThreadHandle[i] = CreateThread(NULL,0,Multiplication,&Index[i],0,&ThreadId[i]);
   ^
prog.cpp:74:41: error: 'Multiplication' was not declared in this scope
   ThreadHandle[i] = CreateThread(NULL,0,Multiplication,&Index[i],0,&ThreadId[i]);
                                         ^
prog.cpp:74:69: error: 'ThreadId' was not declared in this scope
   ThreadHandle[i] = CreateThread(NULL,0,Multiplication,&Index[i],0,&ThreadId[i]);
                                                                     ^
prog.cpp:74:80: error: 'CreateThread' was not declared in this scope
   ThreadHandle[i] = CreateThread(NULL,0,Multiplication,&Index[i],0,&ThreadId[i]);
                                                                                ^
prog.cpp:78:17: error: 'ExitProcess' was not declared in this scope
    ExitProcess(3);
                 ^
prog.cpp:79:4: error: return-statement with no value, in function returning 'int' [-fpermissive]
    return;
    ^
prog.cpp:84:27: error: 'ThreadHandle' was not declared in this scope
  WaitForMultipleObjects(N,ThreadHandle,false,INFINITE);
                           ^
prog.cpp:84:46: error: 'INFINITE' was not declared in this scope
  WaitForMultipleObjects(N,ThreadHandle,false,INFINITE);
                                              ^
prog.cpp:84:54: error: 'WaitForMultipleObjects' was not declared in this scope
  WaitForMultipleObjects(N,ThreadHandle,false,INFINITE);
                                                      ^
prog.cpp:87:30: error: 'CloseHandle' was not declared in this scope
   CloseHandle(ThreadHandle[i]);
                              ^

Standard output is empty