using functions to write the code in C++ [closed] - c++

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Hi i'm trying to Write a program in C++ to, generate and print 20 random numbers, between 0 to 999, and do the following operations without using inbuilt functions, find and print the: min value, max value, average, median, standard deviation, variance. Do a binary search on the 15th element. Please help me with the code.
So far i've done this much
#include
#include
#include
using namespace std;
void minimum(int[], int);
void maximum (int[], int);
void average(int[], int);
void median(int[], int);
void mean(int[], int);
void sort(int[], int);
int ra()
{
int r = rand() % 1000;
return r;
}
int main ()
{
srand(time(NULL));
ra();
int array[20];
int num=20;
for (unsigned int i = 0; i < num; i++)
{
array[i] = ra();
cout << "Index: " << i << ", random number: " << array[i] << endl;
}
minimum();
new_array[20];
num=20;
for (unsigned int i = 0; i < num; i++)
{
new_array[i] = new_array();
cout << "Index: " << i << ", random number: " << minimum << endl;
}
return 0;
}
void minimum(int new_array[], int num)
{
for (unsigned int i = 0; i < num; i++)
if (new_array[i] minimum)
minimum = new_array[i];
cout << "Maximum value: " << minimum << endl;
}
void maximum (int new_array[], int num)
{
for (unsigned int i = 0; i < num; i++)
if (new_array[i] > maximum)
maximum = new_array[i];
cout << "Maximum value: " << maximum << endl;
return 0;
}
void median(int new_array[], int num)
{
//CALCULATE THE MEDIAN (middle number)
if(num % 2 != 0){// is the # of elements odd?
int temp = ((num+1)/2)-1;
cout << "The median is " << new_array[temp] << endl;
}
else{// then it's even! :)
cout << "The median is "<< new_array[(num/2)-1]<<new_array[num/2]< endl;
}
mean(new_array, num);
}
void sort(int new_array[], int num)
{
//ARRANGE VALUES
for(int x=0; x<num; x++){
for(int y=0; y<num-1; y++){
if(new_array[y]>new_array[y+1]){
int temp = new_array[y+1];
new_array[y+1] = new_array[y];
new_array[y] = temp;
}
}
}
cout << "List: ";
for(int i =0; i<num; i++){
cout << new_array[i] << " ";
}
cout << "\n";
median(new_array, num);
}
void average_(int new_array[], int nums)
{
float sum;
for (unsigned int i = 0; i < 20; ++i)
{
sum+=num;
}
cout << "Average value: " << average_/num << endl;
}
Please tell the necessary corrections

Answer 1

You have a ways to go, your code does not do any of the things you want yet. However, you mentioned that you are a beginner so I fixed your code and set up a basic structure of how to get going. I left comments on what I changed and what you need to do. That being said, I don't know what you mean by "Do a binary search on the 15th element"
#include <iostream>
#include <cstdlib>
#include <time.h>
using namespace std;
int ra()
{
// You wanted a number between 0 and 999 inclusive so do not add 1
// Instead do a modulus of 1000
int r = rand() % 1000;
return r;
}
int main ()
{
// Do this to get different random numbers each time you run your program
srand(time(NULL));
// You have to call ra as a function. Do this by writing: ra()
// Here I am storing 20 random numbers in an array
int nums[20];
for (unsigned int i = 0; i < 20; ++i)
{
nums[i] = ra();
cout << "Index: " << i << ", random number: " << nums[i] << endl;
}
// Iterate to find the minimum number
int minimum = nums[0];
for (unsigned int i = 1; i < 20; ++i)
if (nums[i] < minimum)
minimum = nums[i];
cout << "Minimum value: " << minimum << endl;
// TODO: Find the maximum in basically the same way
// TODO: Find the average by summing all numbers then dividing by 20
// TODO: Find the median by sorting nums and taking the average of the two center elements
// TODO: etc.
return 0;
}

Answer 2

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
int r;
int ra;
int i=0;
int ra(){
r = (rand() % 999) + 1;
return r;
}
int main ()
{
int random_;
srand((int)time(0));
while (i++ < 20)
{
random_ = r;
cout<< random_<<endl;
}
return 0;
}