Dynamic Program in C - c

Question

Hi Guys i have edited the questions.Here is my entire code.I have given basic amount of readability to my program.I hope u guys can understand the program.
#include<stdio.h>
#include<stdlib.h>
int Max_Min(int,int,int,int *, int *);
int *Max,Number;
int main()
{
int n1, n2,Maximum_Element=0,*Max;
int i = 0, j = 0;
scanf("%d",&Number);
Max =(int *) malloc(sizeof(int)*Number);//Array Max is created
for (int k = 0;k <(Number/2);k++)
{
scanf("%d", &n1);
scanf("%d", &n2);
Max[k] = Max_Min(0,1,0,&n1,&n2);//Passing integer elements n1,n2 with flag 0
}
Maximum_Element=Max_Min(1,1,((sizeof(Max)*Number)/8),Max,Min);//Passing array elements Max,Min with flag 1 to function Max_Min
printf("Maximum_Element=%d", Maximum_Element);
return 0;
}
int Max_Min(int flag,int Max_Min_flag,int length,int *n1,int *n2)//n1 and n2 should be able to handle array and integers
{
int i=0,j = 0,k1,k2,Min1 = 0, Min2 = 0,count=0, Not_Zero = 0,x=0,y=0, *New_Max = 0,*New_Min;
/*Recursive Loop for splitting the array elements and calling the array */
if (flag == 1)
{
New_Max = (int *)(malloc(sizeof(int)*length));
for (;i <= ((length) / 2);i = i + 2)//
{
k1 = n1[i];
j = i + 1;
if (j <= ((length + 1) / 2))
{
k2 = n1[j];
New_Max[count] = Max_Min(0, 1, 0, &k1, &k2);//It is passing integer elements with flag 0 to function Max_Min
count++;
}
}
New_Max[count] = n1[j + 1];
for (int i = 0;i < count + 1;i++)
{
**/* Problem is assigning Max[i]=New_Max[i] is not getting assigned*/**
Max[i] = New_Max[i];//Copying from New_Max to Max because New_Max will be overwritten,so possible chaunce of dataloss
Not_Zero++;
}
while ((sizeof(Max) / 4 - (Not_Zero))>0)
{
Max[Not_Zero] = 0;
Not_Zero++;
}
/*Logic for calling recursive functions based on the count*/
if (count > 1)
{
count--;
Max_Min(1, 1, count, Max, Min);//Calling Recursive function by Passing Entire Arrays with flag 1.
}
else if (count == 1 && Max[1] == 0)
{
*n1 = Max[0];
*n2 = Min[0];
}
else if (count == 1 && Max[2] == 0)
{
Max_Min(1, 1, count + 1, Max, Min);
count--;
}
}
/*Logic for Finding Maximum & Minimum element is present down*/
if (flag == 0)
{
printf("flag");
if (Max_Min_flag == 1)
{
if (*n1 > *n2)
{
}
else if ((*n1 < *n2) && Max_Min_flag == 1)
{
int temp = 0;
temp = *n1;//5
*n1 = *n2;//7
*n2 = temp;//5
}
}
else if (Max_Min_flag == 2)
{
if (*n1 > *n2)//7>2
{
int temp = 0;
temp = *n1;//2
*n1 = *n2;//2
*n2 = temp;//2,7
}
else if (*n1 < *n2)
{
}
}
}
return *n1;//7
}
Problem is assigning Max[i]=New_Max[i] in function Max_Min().It shows Run time error as "Access violation writing location 0x00000000."

Answer 1

First you need to #include <stdlib.h> to use malloc
You must declare your function before using it.
func must return int*.
Also in func "n", first "Max", and second "Max" needs to be the same variable. Rename "n" to "Max"
This is the code corrected with an extra printf;
#include <stdio.h>
#include <stdlib.h>
int *Max,Number=5;
int* func(int *Max)
{
for(int j=0;j<5;j++)
Max[j]=j;//Its not working in this line
return Max;
}
int main()
{
Max=(int *) malloc(sizeof(int)*Number);
for(int i=0;i<5;i++)
Max[i]=i;
int* x = func(Max);
for(int i=0;i<5;i++)
printf("%d", x[i]);
}

Answer 2

The following contains only minor adaptations of your code and it runs fine:
int *func(int *n);
int *Max,Number=5;
int main()
{
int *x,i;
Max=(int *) malloc(sizeof(int)*Number);
for(i=0;i<Number;i++)
Max[i]=i;
x=func(Max);
free(Max);
return(0);
}
int *func(int *n)
{
int j;
for (j=0;j<Number;j++)
n[j]=Number-j; // reverse the number, just to check
return Max;
}