Fayllar bilan ishlash oqimlariga qaysilar kiradi fstream, ifstream, ofstream

Dastur natijasini toping. a = -10, b = 20, c = -30

1. 
   *1
   
2. 
   0
   
3. 
   X
   
4. 
   error
   

257.

Dastur natijasini toping. a = -10, b = 20, c = -30

1. 
   1
   
2. 
   *0
   
3. 
   X
   
4. 
   error
   

258.