rectangle of asterisks

i created a program where you input a height and width and the output is a rectangle of asterisks. and when a negative height or width or both is entered, the number changes to one, but the output screen is just black, can someone help me with this.

Code:

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#include <iostream>
using namespace std;
int height;
int width;
int tmp;
int tmp2;

int main(){
      cout<<"Enter height rectangle: ";
          cin>>height;
        if(height < 1)
                        height = 1;
                else
                        if(height > 20)
                                height = 20;
               
      cout<<"Enter width rectangle: ";
          cin>>width;
        if(width < 1)
                        width = 1;
                else
                        if(width > 20)
                                width = 20;

      for(tmp = 0; tmp != width; tmp++)
                  cout<<"*";

      for(tmp = 2; tmp != (height ); ++tmp){
                  cout<<"\n*";
        for(tmp2 = 2; tmp2 != (width); ++tmp2)
                        cout<<" ";
                cout<<"*";
          }
      cout << "\n*";
      for(tmp = 1; tmp != (width); ++tmp)
      cout<<"*";                               
     
      cout<<"\n";

          cout<<height<<endl;
          cout<<width<<endl;

          system("pause");
          return 0;
}

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Code:

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        if(width < 1)
                        width = 1;
..

 for(tmp = 1; tmp != (width); ++tmp)

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