C++ Program:

Example:

*   *
  *
*   *

#include <iostream>
using namespace std;

int main() {
  int rows;
  cout <<"Enter number of rows: ";
  cin >> rows;
  for(int i=0; i<rows; i++) {
    for(int j=0; j<rows; j++) {
     if(i==j||j==(rows-i-1))cout<<"* ";
     else cout<<"  ";
    }
    cout<<endl;
  }
  return 0;
}

Output:

Enter number of rows: 4

*     *
  * * 
  * * 
*     *

Main Logic :

for(int i=0; i<rows; i++) {
  for(int j=0; j<rows; j++) {
    if(i==j||j==(rows-i-1))cout<<"* ";
    else cout<<"  ";
  }
  cout<<endl;
}

You can print any thing in this pattern, just replace your value with *