【Python 第24课】 if的嵌套

司南

方法一：

1. x=eval(input('please enter the abscissa'))
   
2. y=eval(input('please enter the ordinate'))
   
3. if x>0:
   
4.     if y>0:
   
5.         print('First quadrant')
   
6.     elif y<0:
   
7.         print('Fourth quadrant')
   
8.     else:
   
9.         print('The number is in active abscissa')
   
10. elif x<0:
    
11.     if y>0:
    
12.         print('Second quadrant')
    
13.     elif y<0:
    
14.         print('Third quadrant')
    
15.     else:
    
16.         print('The number is in negative abscissa')
    
17. else:
    
18.     if y>0:
    
19.         print('The number is in active ordinate')
    
20.     elif y<0:
    
21.         print('The number is in negative ordinate')
    
22.     else:
    
23.         print('The center is waiting for you!!!')

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司南

这是看了看大家的代码，得到的灵感，还可以练练函数~

1. def quadrant(x,y):   
   
2.     if x>0:
   
3.         if y>0:
   
4.             print('First quadrant')
   
5.         elif y<0:
   
6.             print('Fourth quadrant')
   
7.         else:
   
8.             print('The number is in active abscissa')
   
9.     elif x<0:
   
10.         if y>0:
    
11.             print('Second quadrant')
    
12.         elif y<0:
    
13.             print('Third quadrant')
    
14.         else:
    
15.             print('The number is in negative abscissa')
    
16.     else:
    
17.         if y>0:
    
18.             print('The number is in active ordinate')
    
19.         elif y<0:
    
20.             print('The number is in negative ordinate')
    
21.         else:
    
22.             print('The center is waiting for you!!!')
    
23. x=eval(input('please enter the abscissa'))
    
24. y=eval(input('please enter the ordinate'))
    
25. quadrant(x,y)
    

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