a,b,c=eval(input("请输入a,b,c:")) 哪里写错了
时间: 2023-10-24 08:06:08 浏览: 49
这段代码没有明确指定a,b,c的数据类型,eval函数会将输入的字符串当作Python代码进行执行,如果输入的内容不符合语法,就会报错。建议使用input函数获取用户输入,然后再将输入的字符串转换为需要的数据类型,例如:
a = int(input("请输入a:"))
b = float(input("请输入b:"))
c = str(input("请输入c:"))
相关问题
def main(): a = eval(input()) b = eval(input()) operation(a, b)
这是一个Python程序,它定义了一个名为"main"的函数。程序要求用户输入两个数,并调用名为"operation"的函数对这两个数执行某种操作。
要运行这个程序,您需要在Python环境中将以下代码复制并粘贴,然后按Enter键:
```
def operation(a, b):
print("a + b = ", a + b)
print("a - b = ", a - b)
print("a * b = ", a * b)
print("a / b = ", a / b)
def main():
a = eval(input("请输入第一个数:"))
b = eval(input("请输入第二个数:"))
operation(a, b)
if __name__ == "__main__":
main()
```
在程序运行时,它会提示您输入两个数,并输出这两个数的加、减、乘、除的结果。注意,这个程序并没有对输入的数做任何类型检查,所以请确保您输入的是数字,否则程序可能会抛出异常。
a=eval( input ) 2 b=eval( input ) 3 C=eval( input ) print("{: .2f}" . format( (a .+b+C)/3) )
There are some syntax errors in the code you provided. Here's the corrected version:
a = eval(input()) # prompt user to enter a value for a and store it in variable a
b = eval(input()) # prompt user to enter a value for b and store it in variable b
c = eval(input()) # prompt user to enter a value for c and store it in variable c
print("{:.2f}".format((a * b * c) / 3)) # calculate the average of a, b, and c, and print it with 2 decimal places
Note that the input function should be called with parentheses, and each input should be on a separate line. Also, I changed the variable name from C to c to follow Python's naming convention for variables (lowercase).