Pls find out the mistake in my code

general
1

image
image1472×891 65.6 KB

how to code this for any user input ??
#include <bits/stdc++.h>
using namespace std ;

int main(){

int rw , cl ;
cout << "rows : " ;

cin >> rw ;

cout << "columns : " ;

cin >> cl ;

for (int a=1 ; a <= cl ; a++){
    cout << "* " ;
}
cout << endl;

for (int b=1 ; b <= rw-2 ; b++ ){
    cout << "* " ;

    for (int c=1 ; c <= cl-2 ; cl++){
        cout << "  " ;
    }

    cout << "*" ;

    cout << endl;
}

for (int d=1 ; d<= cl ; d++){
    cout << "*" ;
}

return 0;

}
what’s the mistake in this???

2 
#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin >> n;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < n-i; j++){
            cout << "* ";
        }
        cout << "\n";
    }
    return 0;
}
3

#include<stdio.h>
int main() {
int i,j;
for(i=1;i<=5;i++) {
for(j=1;j<=5;j++) {
if(j<=6-i)
printf("* “);
else
printf(” “);
}
printf(”\n");
}
return 0;
}

4

#include < iostream >
using namespace std;
int main()
{
int n,i;
cin>>n;

for(i=1;i<=n;i++)
{
    for(int j=1;j<=n-i;j++)
    {
        cout<<"*";
    }
    cout<<"\n";
}

}

5

#include < iostream >
using namespace std;
int main()
{
int n,i;
cin>>n;

for(i=1;i<=n;i++)
{
for(int j=1;j<=(n+1)-i;j++)
{
cout<<"*";
}
cout<<"\n";
}

}