讲解 program程序、辅导 c/c++，Java编程

Lab 2
The objectives of this lab include the understanding of if statements, loops, input, output and
strings.

Marks: each question is worth 1 mark for a total of 4 marks.

1. Write a program that prompts the user for a password. The password that must be entered is
“cmput101”. If the user enters a different password, the program will continue to prompt the user
for the password. If the user enters the correct the password, the program will print “Logging
in…” and will then exit. You may implement your program with a while loop and use the not
operator.
Sample runs:
Enter your password: cmput303
Enter your password: math313
Enter your password: spring2020
Enter your password: cmput101
Logging in...

2. Write a program that prompts the user for a fruit name. If the user enters “apple”, “pear”, or
“berry”, the program will print “We grow” followed by the fruit name that the user entered. But
if the user enters a different string, the program will print “We don’t grow this fruit!”. You may
use an if statement and the or operator.
4 Sample runs:
Enter a fruit name: apple
We grow apple

Enter a fruit name: pear
We grow pear

Enter a fruit name: berry
We grow berry

Enter a fruit name: mango
We don't grow this fruit!

3. Write a program that prompts the user for a letter and a string. The program outputs (prints)
the number of occurrences of the letter in the string.

Sample run:
Enter a letter: p
Enter a string: apple
The letter p occurs 2 times in the string apple

4. Write a program that inputs individual letters and creates a string of these letters except it will
exclude the letter “x”. To signal the end of the input, the user will input the letter “z”. The final
string should not include any “x” and should not include the “z”. The program must print the
final string.

Sample input and output
Enter a character: o
Enter a character: x
Enter a character: k
Enter a character: a
Enter a character: x
Enter a character: y
Enter a character: z
The final string is okay