c++ array storing and sorting.

So i am suppose to create 3 arrays. one to take the first input, the second to take the second input, and third is to store both input and sort them from least to greater.
here is what suppose to happen

please enter your first input: (file name contains-> " 1,3,5,6,7,9 ")
please enter second input: (second file name contains-> "1,2,4,6,8,0")
please enter the outfile name: (any name you want)
here is your file number
1
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9
end

then it creates another file with the number from both files organize from least to greater form.


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  #include <iostream>
#include <fstream>
#include <string>

using namespace std;

int count=0;
int SortedArray( int A[], int Int_num, int lo, istream &infile)
{
	
	int in = 0;
	int num=0;
	bool found= false;
	infile>>A[in];
	in++;
	//while (in < lo && infile>>A[in])
	while(in < Int_num && infile>>A[in])
   	{	
	if (A[in] > A[in-1] )
	 {
	 	in++;
	 	//A[in]=num; 
	 	count++;
     }
    else 
	 {
	return -1;
     }
    }
	return in;
}


int store(int A[],int Int_num, istream &infile)
{       
		int num=0;
        while(infile>>A[num]&& num <= Int_num)
        {
                num++;
        }
        return num;
}


int display(int A[], int B[], int c[], int lo,int hi, ostream& outfile)
{
	int i;
	int j;
	int f;
	int counter = 0;
	int counter1 = 0;
	int counter3 = 0;
	outfile<<"The numbers are: "<<endl;
for ( i = lo; i<= hi; i++)
{
outfile<<A[i]<< endl;
 counter++;
}
for (j= lo; j<= hi;j++)
{
	outfile<<B[j]<< endl;
	counter1++;
}
for (f= lo; f<= hi;f++)
{
	outfile<<c[f]<< endl;
	counter3++;
}
return counter3;
return counter1;	
return counter;
}


int main()
{
ofstream outfile;
ifstream infile, infile1;

const int Int_num=20;
int int_num2=20;
int int_num3=40;
char infile_name[20], outfile_name[20], infile_name1[20];
int p,A[Int_num],B[int_num2],c[int_num3],N,M,J,item,lo=0,hi,C=0;
bool nope;

// first input
cout<<"please enter your file: "<<endl;
cin>> infile_name;
N = store(A, 20, infile);
infile.open(infile_name);
// second input
cout<<"please enter your file: "<<endl;
cin>> infile_name1;
p = store(B, 20, infile1); 
infile1.open(infile_name1);
// output
cout<<"please enter outfile: "<<endl;
cin>> outfile_name;
outfile.open(outfile_name);



if(!infile)
{
	cout<<"error from infile";
	return 0;
}

if(!outfile)
{
	cout<<"error from outfile";
	return 0;
}

// shorting the Array and storing it into c[]


J=SortedArray(A,Int_num,lo,infile);
M=SortedArray(B,Int_num,lo,infile);
J=0;
M=0;

while(J< Int_num && M < int_num2)
{
	if(A[J] < B[M]) 
	{
		c[C]=A[J];
		J++;
		C++;	
	}
	else
	{
		c[C]=B[M];
		M++;
		C++;
		
	}

}

while (J < Int_num)
{
	c[C]=A[J];
		J++;
		C++;	
}

while (M < int_num2)
{
	c[C]=B[M];
		M++;
		C++;	
}

//outfile<<" the numbers are"<<c<<endl;//display
display(A,B,c, 0,(p-1),outfile);

infile.close();
outfile.close();
return 0;
}
So, do you have any questions?

Your SortedArray(...) does not sort. You need an inner loop that finds the lowest value and another for inserting.

Imagin the numbers come as: 2,3,4,1
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