Hourglass from asterisks

[medosz]

I got totally confused with the nestled for statements.
I am trying to write a program which prints a hourglass from asterisks:
First line: 7 asterisks, next line: 5, then 3, then 1, next 3, next 5 and 7.
Please could someone explain what I am doing wrong. I know there is a big confusion but I don't wanna give up.

  #include <iostream>
using namespace std;

int main(){


for(int row=1; row <=7; row+=2){
  for(int space=1; space<row; space++){
    cout << " ";
  } 
    for(int star=7; star>=row; star--){
      cout<<"*";
    }
    cout<<endl;
}

for(int brow=3; brow<=7; brow+=2){
  for(int bspace=3; bspace>=brow; bspace--){
    cout<< " ";
  }
    for(int bstar=3; bstar<=brow; bstar++){
        cout << "*";
    }
    cout << endl;
}
}

[Repeater]

You're simply getting your logic wrong. On each line, you need to output some spaces, then some stars, then the same number of spaces again.

How about something like:

for outputLine 0 to 3
{
  output  outPutLine spaces
  output  7 - ( 2 * outPutLine) stars
  output  outPutLine spaces
}

for outputLine 4 to 6
{
  output (6 - outputLine) spaces
  output (2 * outputLine - 5) stars
  output (6 - outputLine) spaces
}

Each of those "output" lines is itself a little for loop, or even better, a function call that contains a little for loop. You should start by writing that simple output function so that you can then easily experiement with the logic of your code.

[medosz]

Thank you, it helped a lot;

 #include <iostream>
using namespace std;

int main(){


for(int row=0; row <=3; row++){
  for(int space=1; space<=row; space++){
      cout << " ";
   }
     for(int star=1; star<= 7-(2*row); star++){
     cout << "*";
     }
     for(int space2=1; space2<row; space2++){
         cout << " ";
     }
     cout << endl;
}
for(int rowb=4; rowb<=6; rowb++){
    for(int spaceb=1; spaceb<=6-rowb; spaceb++){
      cout<< " ";
    }
    for(int starb=1; starb<=2*rowb-5; starb++){
        cout << "*";
    }
    for(int spaceb2=1; spaceb2<=6-rowb; spaceb2++){
        cout << " ";
    }
    cout<< endl;
}
}