python课后实验（3）(Python after class experiment (3))

1、

n = eval(input("请输入一个正整数："))
s = str(n) + '=1'
a=2
while n>2:
    if n%a==0:
        s = s+"*" +str(a)
        n=n/a
    else:
        a=a+1
print(s)

2、

s = input("请输入字符串：")
a,b,c,d=0,0,0,0

for i in s:
    if i=="":
        a+=1
    elif '0'<=i<='9':
        b+=1
    elif 'a'<=i<='z' or 'A'<=i<='Z':
        c+=1
    else:
        d+=1
print("输入的字符串有{}个空格，{}个数字，{}个英文字母，{}个其他字符".format(a,b,c,d))

3、

a=eval(input("请输入第一个正整数："))
b=eval(input("请输入第二个正整数："))
c=0
for i in range(a,b+1):
    s = str(i)
    if s.count('8')>0:
        c=c+1
print('{}和{}之间有{}个数含有数字8'.format(a,b,c))

4、

a = input("请输入整数a:")
b = input("请输入整数b:")
import random
random.seed(1000)
for i in range(a):
    s = random.randint(100,999)
    if i%5==4:
        print(s)
    else:
        print('{}'.format(x),end=' ')
    if x%b ==0:
        c=c+1

print('\n总共{}个数能被{}整除'.format(c,b))

5、

def func(a):
    sum = 0
    while a!=0:
        sum = sum+(a%10)
        a = a//10
    return sum
a = int(input('请输入一个整数：'))
sum = func(a)
print('它的各位数字和为{}'.format(sum))

6、

def func(s):
    ct = 0
    for c in s:
        if c>='A' and c<='Z':
            ct+=1
        return ct

s = str(input())
print(func(s))

7、

def count(string):    c,d=0,0    for s in string:        if '0'<=s<='9':            c = c+1        if 'a'<=s<='z' or 'A'<=s<='Z':            d = d+1        return c,dstr = input("请输入一个参数字符串：")c,d=count(str)print("字符串中有{}个数字，{}个字母".format(c,d))

8、

def IsPrime(n):
    for i in range(2,n-1):
        if n%i==0:
            return False
    return True

m,n = eval(input('请输入整数m:')),eval(input('请输入整数n:'))
c=0
for i in range(m,n+1):
    if IsPrime(i)：
        c = c+i
print("范围在{},{}的素数和为{}".format(m,n,c))
————————

1、

n = eval(input("请输入一个正整数："))
s = str(n) + '=1'
a=2
while n>2:
    if n%a==0:
        s = s+"*" +str(a)
        n=n/a
    else:
        a=a+1
print(s)

2、

s = input("请输入字符串：")
a,b,c,d=0,0,0,0

for i in s:
    if i=="":
        a+=1
    elif '0'<=i<='9':
        b+=1
    elif 'a'<=i<='z' or 'A'<=i<='Z':
        c+=1
    else:
        d+=1
print("输入的字符串有{}个空格，{}个数字，{}个英文字母，{}个其他字符".format(a,b,c,d))

3、

a=eval(input("请输入第一个正整数："))
b=eval(input("请输入第二个正整数："))
c=0
for i in range(a,b+1):
    s = str(i)
    if s.count('8')>0:
        c=c+1
print('{}和{}之间有{}个数含有数字8'.format(a,b,c))

4、

a = input("请输入整数a:")
b = input("请输入整数b:")
import random
random.seed(1000)
for i in range(a):
    s = random.randint(100,999)
    if i%5==4:
        print(s)
    else:
        print('{}'.format(x),end=' ')
    if x%b ==0:
        c=c+1

print('\n总共{}个数能被{}整除'.format(c,b))

5、

def func(a):
    sum = 0
    while a!=0:
        sum = sum+(a%10)
        a = a//10
    return sum
a = int(input('请输入一个整数：'))
sum = func(a)
print('它的各位数字和为{}'.format(sum))

6、

def func(s):
    ct = 0
    for c in s:
        if c>='A' and c<='Z':
            ct+=1
        return ct

s = str(input())
print(func(s))

7、

def count(string):    c,d=0,0    for s in string:        if '0'<=s<='9':            c = c+1        if 'a'<=s<='z' or 'A'<=s<='Z':            d = d+1        return c,dstr = input("请输入一个参数字符串：")c,d=count(str)print("字符串中有{}个数字，{}个字母".format(c,d))

8、

def IsPrime(n):
    for i in range(2,n-1):
        if n%i==0:
            return False
    return True

m,n = eval(input('请输入整数m:')),eval(input('请输入整数n:'))
c=0
for i in range(m,n+1):
    if IsPrime(i)：
        c = c+i
print("范围在{},{}的素数和为{}".format(m,n,c))