1、输入2个数字,输出最大数。 a = int(input(‘>>>’)) b = int(input(‘>>>’)) if a >= b: print(a) else: print(b)
2、输入两个数,比较大小后,从小到大升序打印。 a = int(input('first: ')) b = int(input('second: '))
if a > b: print(b,a) 或者 print(b,a) if a > b else print(a,b) #三目运算符 else: print(a,b)
3、请输入若干个整数,打印出最大值。 (1) numbei = int(input("number")) n = int(input("how")) for i in range(n): newnumber = int(input("number")) if number >= number: number = newnomber else: print(number) (2) m = int(input("Input first number >>>")) while True: a = input("Input a number >>>") if a: a = int(a) if a > m: m = a print('Max is',m) else: break
4、给定一个不超过五位的正整数,判断其有几位。 (1) val = int(input(‘>>>’)) if val >= 10000: b = 5 elif val >= 1000: b = 4 elif val >= 100: b = 3 elif val>= 10: b = 2 else: b = 1 print(b)
(2) val = int(input(‘>>>’)) if val >= 1000: if val >= 10000: b = 5 else: b = 4 else: if val >= 100: b = 3 elif val >= 10: b = 2 else: b = 1 print(b) (3) newnumber = input("nember") length = len(newnumber) #取字符串 if length > 5: print(5) elif length > 4: print(4) elif length > 3: print(3) elif length > 2: print(2) else: print(1)
5、给定一个不超过5位的正整数,判断该数的位数,依次打印出个位、十位、百位、千位、万位的数字。 (1) a = int(input('>>>')) if a >= 1000: if a >= 10000: b = 5 else: b = 4 else: if a >= 100: b = 3 elif a >= 10: b = 2 else: b = 1 print(b) for i in range(b): print(a % 10) a = a // 10 (2) val = input('>>>') val = int(val) print(val) if val >= 1000: # 折半 if val >= 10000: num = 5 else: num = 4 else: if val >= 100: num = 3 elif val >= 10: num = 2 else: num = 1 print(num) c = val for i in range(num): n = c // 10 print(c - n*10) c = n
6、给定一个不超过5位的正整数,判断该数的位数,依次从万位打印到个位的数字。 (1) val=int(input('>>>')) if val>=1000: if val >= 10000: num = 5 else: num = 4 else: if val >= 100: num = 3 elif val >= 10: num = 2 else: num = 1 print(num) pre=0 for i in range(num,0,-1): cur = val // (10 ** (i-1)) print(cur - pre*10) pre = cur (2) c = int(print('>>>')) w = 10000 for i in range(5): print(c//w) c %= w w //= 10 (3) c = int(input('>>>')) length = len(c) #取字符长度 w = 10 ** (length - 1) flag = False while w: t = c // w if flag: print(t,end = ' ') else: if t: print(t,end = ' ') flag = True else: length-=1 c %= w w //= 10 print() print("The length of number is",length)
7、打印一个边长为n的正方形 (1) n = int(input('>>>')) print(n * ’*’) for i in range(n-2): print(‘*’ + ’ ’*(n-2) + ’*’) print(n * ’*’) (2) n = int(input('>>>')) e = -n // 2 for i in range(e,n+e): if i == e or i == n+e-1: print('*'*n) else: print('*' + ''(n-2) + '*')
8、求100内所有奇数的和(2500) sum = 0 for i in range(1,100,2): sum += i print(sum)
9、判断学生成绩,成绩等级A-E,其中,90分以上为‘A’,80~89分为'B',70~79分为'C',60~69分为'D',60分以下为'E' (1) a = int(input('>>>')) if a >= 90: b = 'A' elif a >= 80: b = 'B' elif a >= 70: b = 'C' elif a >= 60: b = 'D' else: b = 'E' print(b)
10、求1到5阶乘之和 sum = 0 a = 1 for i in range(1,6): a = i * a sum += a print(sum)
11、给一个数,判断它是否是素数(质数),质数:一个大于1的自然数只能被1和它本身整除 num = int(input('>>>')) for i in range(2,int((num**0.5)+1)): if num % i == 0: print('这不是质数') break else: print('这是个质数') 作业
1、打印九九乘法表 (1)左下角,未对齐: for i in range(1,10): for j in range(1,i+1): print(j,'x',i,'=',i*j,end=' ') print() (2)左下角,已对其: for i in range(1,10): for j in range(1,i+1): print('{}*{}={:<{}}'.format(j,i,i*j,2 if j<2 else 3),end='') print() (2)右上角 for i in range(1,10): line='' for j in range(i,10): line+='{}*{}={:<{}}'.format(i,j,i*j,2 if j<4 else 3) print('{:>65}'.format(line))
2、打印实心菱形 (1) n = int(input('奇数')) e = n//2 for i in range(-e,n-e): a = -i if i < 0 else i print(' '*a+'*'*(n-a*2)) (2) n = int(input('输入一个数>>>')) if not n % 2: n += 1 e = n//2 for i in range(-e,n-e): print(' '*abs(i) + '*'*(n-2*abs(i))) #abs:绝对值
3、打印对顶三角形 n = int(input('输入一个奇数>>>')) e = n//2 for i in range(-e,n-e): print(' '*(e-abs(i)) + '*'*(2*abs(i)+1))
4、打印闪电 n = int(input('>>>')) e = n//2 for i in range(-e,n-e): if i < 0: print(' '*(e) + '*'*(n-e+i )) elif i == 0: print(n*'*') else: print(e*' '+'*'*(n-e-i))
5、打印100以内的斐波那契数列 a = 1 b = 1 print(a) print(b) for i in range(2,101): if i == a + b: print(i) a = b b = i
6、求斐波那契数列第101项 (1) a = 1 b = 1 count = 2 while True: sum = a + b a = b b = sum count += 1 if count == 101: break print(sum) (2) a = 1 b = 1 for i in range(2,101): sum = a + b a = b b = sum print(sum)
7、求10万内的所有素数 (1) import datetime start=datetime.datetime.now() print(2,"\t",end="") count = 1 for i in range(3,100001,2): for j in range(2,int((i**0.5)+1),2): if i % j == 0: break else: print(i,"\t",end="") count += 1 print(count) delta = (datetime.datetime.now() - start).total_seconds() #时间计算 print(delta)
8、猴子吃桃 n = 1 for i in range(1,10): n = 2 * (n+1) print(n)
9、给一个半径。求圆的面积和周长,圆周率为3.14. (1) R = int(input(输入一个半径)) S = 3.14 * (R ** 2) L = 3.14 * 2R print("Area is" S) print("Perimeter is" L) (2) R = int(input('r=')) print('area=' + str(3.14*R*R)) print('perimeter=' + str(3.14*2*R))
10、输入n个数,求每次输入后的算术平均数。 count = 0 sum = 0 while True: num = input(">>>") if not num: break else: num = int(num) sum += num count += 1 print(sum / count)