为什么不通过我的程序注册用户输入

Question

我想在python 3.5中创建一个程序，它基本上是一个计算器，如果用户输入的无花果组合在一起形成一个有效的三角形，那么这个计算器就可以运行。

但是，在运行程序时，控制台中输入的任何浮点数未注册。

我使用的是视觉编码工作室，而且我也是编码方面的小老手，所以任何建设性的批评都非常感谢。

print("************************")                          
print("** ASSIGNMENT (V 2.6) **") 
print("************************") 

# User input variables/functions 

side_a = float(input("please input the length of the 1st side of the triangle "))              
side_b = float(input("please input the length of the 2nd side of the triangle "))              
base = float(input("please input the length of the base of the triangle "))                


# Formulas 

perim_halved  = (side_a+side_b+base)/2                         
area_of_triangle = ((perim_halved*(perim_halved-side_a)*(perim_halved-side_b)*(perim_halved-base))**(1/2))              
perimeter  = (side_a+side_b+base)                          
height   = (area_of_triangle/base)                          


# Def Functions                              

def valid_triangle(): 
    print("******* Your triangle is valid ******** ")                     
    print("******* Area of triangle =", area_of_triangle,"*******")                 
    print("******* Perimeter of triangle =", perimeter,"*******")                 
    print("******* Height of triangle = ", height,"*******")                   

def invalid_triangle(): 
    print("******* Your triangle is not valid *******")                     
    print("******** Goodbye ********") 

def scalene(): 
    print("******* Your triangle is a Scalene triangle *******")                   
def isosceles(): 
    print("******* Your triangle is an Isosceles triangle *******")     
def equilateral(): 
    print("******* Your triangle is an Equilateral triangle *******") 
def right_angle(): 
    print("******* Your triangle is a Right angled triangle *******") 
def scalene_right_angle(): 
    print("******* Your triangle is a scalene and a right angled triangle ********") 
def isosceles_right_angle(): 
    print("******* Your triangle is an Isosceles and a right angled triangle *******") 

# If statements 

if side_a + base > side_b and side_a +side_b > base and base + side_b > side_a :             


if side_a == side_b and side_b == base:                        
    valid_triangle()                            
    equilateral()                             


elif side_a == side_b and side_b != base:                       
    if side_a**2+side_b**2==base**2:                        
     valid_triangle()                           
     isosceles_right_angle()                          
    elif side_a**2+side_b**2!=base**2:                 
     valid_triangle()                            
     isosceles()                              


elif side_a != side_b or base and side_b != side_a or base and base != side_a or side_b:    
    if side_a**2+side_b**2==base**2:                  
     valid_triangle()                           
     scalene_right_angle()                        
    elif side_a**2+side_b**2!=base**2:                 
     valid_triangle()                            
     scalene()                               

# Right angle only 

elif side_a**2+side_b**2==base**2:                  
    valid_triangle()                          
    right_angle()                           

else: 
    invalid_triangle()                           

Answer 1

你有不适当的缩进你的代码 - 在Python中它很重要！

几乎后

if side_a + base > side_b and side_a +side_b > base and base + side_b > side_a :  

所有行必须缩进（除了最后2）。

所以你完全修正码（它的工作原理 - 我测试了它）将是：

# Tested (and works) in Python 3.5.2 

print("************************")                          
print("** ASSIGNMENT (V 2.6) **") 
print("************************") 

# User input variables/functions 

side_a = float(input("Please input the length of the 1st side of the triangle: "))              
side_b = float(input("Please input the length of the 2nd side of the triangle: "))              
base = float(input("Please input the length of the base of the triangle : "))                


# Formulas 

perim_halved  = (side_a+side_b+base)/2                         
area_of_triangle = ((perim_halved*(perim_halved-side_a)*(perim_halved-side_b)*(perim_halved-base))**(1/2))              
perimeter  = (side_a+side_b+base)                          
height   = (area_of_triangle/base)                          


# Def Functions                              

def valid_triangle(): 
    print("******* Your triangle is valid ******** ")                     
    print("******* Area of triangle =", area_of_triangle,"*******")                 
    print("******* Perimeter of triangle =", perimeter,"*******")                 
    print("******* Height of triangle = ", height,"*******")                   

def invalid_triangle(): 
    print("******* Your triangle is not valid *******")                     
    print("******** Goodbye ********") 

def scalene(): 
    print("******* Your triangle is a Scalene triangle *******")                   
def isosceles(): 
    print("******* Your triangle is an Isosceles triangle *******")     
def equilateral(): 
    print("******* Your triangle is an Equilateral triangle *******") 
def right_angle(): 
    print("******* Your triangle is a Right angled triangle *******") 
def scalene_right_angle(): 
    print("******* Your triangle is a scalene and a right angled triangle ********") 
def isosceles_right_angle(): 
    print("******* Your triangle is an Isosceles and a right angled triangle *******") 

# If statements 

if side_a + base > side_b and side_a +side_b > base and base + side_b > side_a :             


    if side_a == side_b and side_b == base:                        
     valid_triangle()                            
     equilateral()                             


    elif side_a == side_b and side_b != base:                       
     if side_a**2+side_b**2==base**2:                        
      valid_triangle()                           
      isosceles_right_angle()                          
     elif side_a**2+side_b**2!=base**2:                 
      valid_triangle()                            
      isosceles()                              


    elif side_a != side_b or base and side_b != side_a or base and base != side_a or side_b:    
     if side_a**2+side_b**2==base**2:                  
      valid_triangle()                           
      scalene_right_angle()                        
     elif side_a**2+side_b**2!=base**2:                 
      valid_triangle()                            
      scalene()                               

    # Right angle only 

    elif side_a**2+side_b**2==base**2:                  
     valid_triangle()                          
     right_angle()                           

else: 
    invalid_triangle()