程序代写代做代考 Programming Exercise 3-1

Programming Exercise 3-1

Programming Exercise 8-10

# Function displays the character that appears most frequently

# in the string. If several characters have the same highest

# frequency, displays the first character with that frequency.

def main():

# Set up local variables

count = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

letters = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ’

index = 0

frequent = 0

# Receive user input.

user_string = input(‘Enter a string: ‘)

for ch in user_string:

ch = ch.upper()

# Determine which letter this character is.

index = letters.find(ch)

if index>=0:

# Increase counting array for this letter.

count[index] = count[index] + 1

for i in range(len(count)):

if count[i] > count[frequent]:

frequent = i

print(‘The character that appears most frequently’

‘ in the string is ‘, letters[frequent], ‘.’,

sep=”)

# Call the main function.

main()