Question

我希望你们都度过了充实的一天。我正在学习python，我写了这个小欧姆定律计算器作为学习练习。该程序工作正常，但即使我将用户输入转换为“float”，函数只返回整数答案。（例如，如果我选择电压并输入0.7安培，则返回一个不正确的整数）这是我的代码：

# ohm's law calculator

# These functions perform the calculations, but the result currently only prints as an integer.
def voltage(i, r):
    return i * r



def current(r, v):
    return r / v


def resistance(i, v):
    return i / v




# First user interface menu    

print "What value would you like to solve for?"

print "1. Voltage"
print "2. Current"
print "3. Resistance"

choice = raw_input(">>> ")



#These are calling the functions.

#This gives values to "i" and "r" from user input as floating point numbers the print line calls the "voltage" function and prints out the results of its calculation using "%d"
if choice == "1":
    i=float(raw_input("Enter current:"))
    r=float(raw_input("Enter resistance:"))
    print "%d volts" % voltage(i, r)


elif choice == "2":
    r=float(raw_input("Enter resistance:"))
    v=float(raw_input("Enter voltage:"))
    print "%d amps" % current(r, v)



elif choice == "3":  
    i=float(raw_input("Enter current:"))
    v=float(raw_input("Enter voltage:"))
    print "%d ohms" % resistance(i, v)

#This line is here partly because its funny, and partly because I thought it would be cool to create my own error message   
else:
print "Invalid number. Your system will crash momentarily."

我也很感激有关使这段代码更清洁的任何提示。一世。即更具可读性或工作效率更高。感谢。

Answer 1

请勿使用%d输出浮点数，请使用%f。

更好的是使用新的format函数，让Python选择最佳表示：

print "{0} volts".format(voltage(i, r))

Python：浮点输入作为整数输出返回？

1 个答案: