python 学习第一天2021-09-17

#使⽤input()函数获取键盘输⼊(字符串)

#使⽤int()函数将输⼊的字符串转换成整数

#使⽤print()函数输出带占位符的字符串

a = int(input('a = '))

b = int(input('b = '))

print('%d + %d = %d' % (a, b, a + b))

print('%d - %d = %d' % (a, b, a - b))

print('%d * %d = %d' % (a, b, a * b))

print('%d / %d = %f' % (a, b, a / b))

print('%d // %d = %d' % (a, b, a // b))

print('%d %% %d = %d' % (a, b, a % b))

print('%d ** %d = %d' % (a, b, a ** b))

#赋值运算符和复合赋值运算符

a = 10

b = 3

a += b # 相当于：a = a + b

a *= a + 2 # 相当于：a = a * (a + 2)

print(a) # 算⼀下这⾥会输出什么

#⽐较运算符和逻辑运算符的使⽤

flag0 = 1 == 1

flag1 = 3 > 2

flag2 = 2 < 1

flag3 = flag1 and flag2

flag4 = flag1 or flag2

flag5 = not (1 != 2)

print('flag0 =', flag0) # flag0 = True

print('flag1 =', flag1) # flag1 = True

print('flag2 =', flag2) # flag2 = False

print('flag3 =', flag3) # flag3 = False

print('flag4 =', flag4) # flag4 = True

print('flag5 =', flag5) # flag5 = False

练习：将华⽒温度转换为摄⽒温度

f = float(input('请输⼊华⽒温度: '))

c = (f - 32) / 1.8

print('%.1f华⽒度 = %.1f摄⽒度' % (f, c))