Question

Write a c++ code into the given code  to find composite numbers from the given random number list. The composite numbers is only counted once if there is a repeated number. I need to use this code and add on a code to find if the numbers generated is a composite function. Please help

#include <cmath>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <vector>

using namespace std;

int main() {

   srand(time(NULL));
int size_of_list = 0; // the number of random numbers to be generated
   int count = 0; // counter to count the number of composite numbers

while (size_of_list <= 0) {
       cout << "How many randome numbers are to be generated?" << endl;
       cin >> size_of_list;
   }

   vector <long> list(size_of_list); // the list of random numbers
   vector <bool> counted(size_of_list, false);

   cout << endl << "The random numbers are" << endl << endl;
   for(int i=0; i<size_of_list; ++i) {
       list.at(i) = rand() % 100 + 1;
       cout << list.at(i) << " ";
   }

}

Answer 1

Please find the answer below.
Please do comments in case of any issue. Also, don't forget to rate the question. Thank You.

main.cpp

#include <cmath>
#include <cstdlib>
#include <ctime>
#include <iostream>
#include <vector>

using namespace std;

bool isCompositeNumber(long num){
for(int i=2;i<num;i++){
if(num%i==0){
return true;
}
}
return false;
}
int main() {

srand(time(NULL));
int size_of_list = 0; // the number of random numbers to be generated
int count = 0; // counter to count the number of composite numbers

while (size_of_list <= 0) {
cout << "How many randome numbers are to be generated?" << endl;
cin >> size_of_list;
}

vector <long> list(size_of_list); // the list of random numbers
vector <long> compositeList; //list of composite numbers

cout << endl << "The random numbers are" << endl << endl;
for(int i=0; i<size_of_list; ++i) {
list.at(i) = rand() % 100 + 1;
cout << list.at(i) << " ";
}

cout << endl << "Calculating composite numbers..." << endl << endl;
int num;
bool found= false;
for(int i=0; i<size_of_list; ++i) {
num = list.at(i);
if(isCompositeNumber(num)){

found= false;
//now check if number already added or not
for(unsigned int i=0; i<compositeList.size(); ++i) {
if(num==compositeList[i]){
found = true;
break;
}
}

//if not found add number of vector
if(!found)
compositeList.push_back(num);
}
}
cout << endl << "The composite numbers are" << endl << endl;
for(unsigned int i=0; i<compositeList.size(); ++i) {
cout << compositeList.at(i) << " ";
}

}

E.txt Console x <terminated> cppProject Debug (C/C++ Application] C:\Users\Mohammad Shahrukh\Desktop\ How many randome numbers are to be generated? 20 — The random numbers are 52 2 46 27 1 82 43 31 82 899 72 80 50 16 75 65 38 63 12 calculating composite numbers... m) { The composite numbers are 52 46 27 82 8 99 72 80 50 16 75 65 38 63 12