1控制台打印“当前进入加减乘除运算” 2函数命名为:“jiaFa(int x,int y), jianFa(int x,int y), chengFa(int x,int y), chuFa(int x,int y) 3分别写出四个函数的具体实现 4调用加减乘除函数，实现5+5 = 10，5-5=0，5*5=25,5/5=1 输出

1. 当前进入加减乘除运算

2. 四个函数命名为：

def jiaFa(x, y):
    pass

def jianFa(x, y):
    pass

def chengFa(x, y):
    pass

def chuFa(x, y):
    pass

3. 四个函数的具体实现如下：

def jiaFa(x, y):
    return x + y

def jianFa(x, y):
    return x - y

def chengFa(x, y):
    return x * y

def chuFa(x, y):
    if y == 0:
        return "除数不能为0"
    else:
        return x / y

4. 调用加减乘除函数，实现5+5 = 10，5-5=0，5*5=25,5/5=1 的代码如下：

a = 5
b = 5

print("5 + 5 =", jiaFa(a, b))
print("5 - 5 =", jianFa(a, b))
print("5 * 5 =", chengFa(a, b))
print("5 / 5 =", chuFa(a, b))

输出结果为：

5 + 5 = 10
5 - 5 = 0
5 * 5 = 25
5 / 5 = 1.0