Question 1

1. A letter's frequency

Develop a function named oneLetterFrequency that:

• takes in a word (std::string type) and a letter (char type) as parameters,
• returns number of occurrence of that letter in the given word.

For example:

• oneLetterFrequency("hello", 'l') should return 2, as letter l appears twice in word "hello".
• oneLetterFrequency("hello, how are you Oliver007?") should return 3, as letter o appears three times in the given word.
• oneLetterFrequency("abcdefg", 'h') should return 0, as letter h is not in the given word.
• Please use provided source code to finish each step, then mark the lab question as completed.

• step 1

  Expected output:

  2

Given by Sir :

// file: letterFreq.cpp

#include

#include

// TODO: define the prototype of required function.

int main(){

// step 1: uncomment following code snippet to call function oneLetterFrequency()

// expected output: 2

//std::cout << oneLetterFrequency("hello", 'l') << std::endl;

// step 2: uncomment following code snippet to call function oneLetterFrequency()

// expected output: 3

// std::cout << oneLetterFrequency("hello, how are you Oliver007?", 'o') << std::endl;

// // step 3: uncomment following code snippet to call function oneLetterFrequency()

// // expected output: 0

// std::cout << oneLetterFrequency("abcdefg", 'h') << std::endl;

return 0;

}

// TODO: implment require function.

Question 2:

2. Debug Exercise

Your instructor deliberately placed several syntax errors and/or logical errors in the given source code. These bugs need to be fixed so the program can convert a non-negative decimal integer to its corresponding binary number.

Please fix these bugs, then use Check it! to harvest points, and mark the question as completed.

step 1

Expected output:

110001 1011110 1001101

Given by Sir:

// File: bugs.cpp

// Name: Huabo Lu

// Date: 01/26/2022

#include

#include

#include //for std::reverse()

std::string D2BConverter(int num) {}

int main(){

// expected output : 110001

std::cout << D2BConverter(49) << std::endl;

// expected output : 1011110

std::cout << D2BConverter(94) << std::endl;

// expected output : 1001101

std::cout << D2BConverter(77) << std::endl;

return 0;

}

std::string D2BConverter(int num){

std:::string r_result{};

while(num != 1){

r_result = std::to_string(num / 2);

num /= 2;

}

return std::reverse(r_result.begin(), r_result.end());

}