i have a problem in my program that iam not able to solve

Code:

// final.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <conio.h>
using namespace std;
int call_box(int a[8][8],int box){
	if(box>=1&&box<=8){
		int i=0;
		int j=box-1;
			return a[i][j];}
	if(box>=9&&box<=16){
	int i=1;
	int j=box-9;
	return a[i][j];}
	if(box>=17&&box<=24){
		int i=2;
		
		int j=box-17;
	return a[i][j];
	}
	if(box>=25&&box<=32){
		int i=3;
		
	int j=box-25;
	return a[i][j];
	}
	if(box>=33&&box<=40){
		int i=4;
		
	int j=box-33;
	return a[i][j];
	}
	if(box>=41&&box<=48){
		int i=5;
		
	int j=box-41;
	return a[i][j];
	}
	if(box>49&&box<=56){
		int i=6;
		
	int j=box-49;
	return a[i][j];
	}
	if(box>=57&&box<=64){
		int i=7;
		
	int j=box-57;
	return a[i][j];
	}
}

int call_boxf(int l[8][8],int box){
	if(box>=1&&box<=8){
		int i=0;
		int j=box;
			return l[i][j];}
	if(box>=9&&box<=16){
	int i=1;
	int j=box-9;
	return l[i][j];}
	if(box>=17&&box<=24){
		int i=2;
		
		int j=box-17;
	return l[i][j];
	}
	if(box>=25&&box<=32){
		int i=3;
		
	int j=box-25;
	return l[i][j];
	}
	if(box>=33&&box<=40){
		int i=4;
		
	int j=box-33;
	return l[i][j];
	}
	if(box>=41&&box<=48){
		int i=5;
		
	int j=box-41;
	return l[i][j];
	}
	if(box>49&&box<=56){
		int i=6;
		
	int j=box-49;
	return l[i][j];
	}
	if(box>=57&&box<=64){
		int i=7;
		
	int j=box-57;
	return l[i][j];
	}
}


int check_and_copy(int a[8][8],int l[8][8], int final[8][8]){
	cout<<"enter the number of each square by pressing enter after each square number";
		int box1;
		int box2;
		int count=0;
		int countg=0;
	while(count<32){
		
		cin>>box1;
		cin>>box2;
		if(box1>=1&&box1<=64&&box2>=1&&box2<=64)
		call_box(a,box1);
		call_box(a,box2);
		if(call_box(a,box1)==call_box(a,box2)){
			if(call_box(a,box1)!=call_boxf(final,box1)){

				call_boxf(final,box1)=call_box(a,box1);
			call_boxf(final,box2)=call_box(a,box2);
			count++;
			cout<<"your answer is right enter another one";}
			else{cout<<"you already gave this answer";}
		}else{ cout<<"your answer is wrong try again";}
		else{ cout<<"you answer is out of bound try again";}
		for(int i=0;i<7;i++){
		for(int j=0;j<7;j++){
			cout<<l[i][j]<<"  ";}cout<<endl;}
		cout<<countg;}
	
		return final[8][8];}
void assign_half(int a[8][8],int r, int c){
	for(int i=0;i<4;i++){
		for(int j=0;j<8;j++){
			a[i][j]=rand()%100;
	}
	}
}
void double_of_each(int a[8][8],int r,int c){
	int maxr=4;
	
	for(int i=0;i<4;i++){
		int maxc=7;
		for(int j=0;j<8;j++){
			a[maxr][maxc]=a[i][j];
			maxc--;
		}
		maxr++;}
}

int assignl(int l[8][8],int r,int c){
	int f=1;
	for(int b=0;b<8;b++){
		for(int c=0;c<8;c++){
			l[b][c]=f;
			f++;
				
	}}
	return l[8][8];
}
void disp(int l[8][8],int r,int c){
	for(int i=0;i<r;i++){
		for(int j=0;j<c;j++){
				cout<<l[i][j]<<"  ";
		}
		cout<<endl;
	}
}
int _tmain(int argc, _TCHAR* argv[])
{
	int a[8][8]={0};
	int f[8][8]={0};
	int l[8][8]={0};
	int r=8;
	int c=8;
	assignl(l,r,c);
	disp(l,r,c);
	assign_half(a,r,c);
	double_of_each(a,r,c);
	check_and_copy(a,l,f);
	getch();
	return 0;
}

the error is in these lines
call_boxf(final,box1)=call_box(a,box1);
call_boxf(final,box2)=call_box(a,box2);

error C2106: '=' : left operand must be l-value

What the hell is it supposed to do?
I will be damn impressed if some other programmer can tell me?

well one reason is probably because you are not returning a value from call_box and that call_boxf is not a reference.. so cannot store values like a variable can...they're rvalues
a = 19 ; a is a lvalue, 19 is a rvalue
so it is telling you that call_boxf(f,b) is an lvalue, you can return a value from the function and store in a variable..try returning a reference from call_boxf..but bad practice.

Originally Posted by Eman

...a = 19 ; a is a rvalue, 19 is a lvalue...

It's the other way around.
Variables tend to appear on the left-hand side of an assignment and they're assignable.
However, constants, function calls and temporaries and right-hand side values since they're not assignable.
(Okay, that's probably not entirely right; but think of it as a simplified model.)

In any case, what you did was basically try to assign a temporary to a temporary, which isn't allowed.
What are you trying to do?

oops..didn't see that.
Thanks

is the assign the returned value by the call_box to the the returned value of call_boxf
and it is not working

yes, because you can't assign an rvalue to another rvalue, or a temp to another temp.

Yes, but WHY are you doing that?