6- String and C String Manipulation

8/7/2019 6- String and C String Manipulation

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String and C-StringManipulation

CS101P -2

(Logic Formulation, Algorithms and ProblemSolving 2)


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Sample Program (String Class)


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Program Output with Example input

Enter a sentence of no more than 79 characters:C++ is challenging but fun! [Enter]The sentence you entered is:

C++ is challenging but fun!


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Program 2// This program demonstrates the C++ string class.

#include

#include // Required for the string classusing namespace std;

void main(void)

{

string movieTitle;

string name("William Smith");

movieTitle = "Wheels of Fury";

cout


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Program 3// This program uses the == operator to compare the string entered

// by the user with the valid stereo part numbers.

#include

#include

using namespace std;

void main(void)

{

const float aprice = 249.0, bprice = 299.0;string partNum;

cout


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Program 3 (continued)if (partNum == "S147-29A")

cout


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Program 4// This program demonstrates the C++ string class.

#include

#include using namespace std;

void main(void)

{

string str1, str2, str3;str1 = "ABC";

str2 = "DEF";

str3 = str1 + str2;

cout


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Program Output

ABC

DEF

ABCDEFABCDEFGHI


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Program 5// This program demonstrates a function, countChars, that counts

// the number of times a specific character appears in a string.

#include int countChars(char *, char); // Function prototype

void main(void)

{ char userString[51], letter;

cout


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Program 5 continues

// Definition of countChars. The parameter strPtr is a pointer

// that points to a string. The parameter ch is a character that

// the function searches for in the string. The function returns

// the number of times the character appears in the string.

int countChars(char *strPtr, char ch)

{

int times = 0;while (*strPtr != '\0')

{

if (*strPtr == ch)

times++;strPtr++;

}return times;

}


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Program Output With Example input

Enter a string (up to 50 characters):Starting Out With C++ [Enter]Enter a character and I will tell you how manytimes it appears in the string: t [Enter]

t appears 4 times.


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LABORATORY EXERCISE

STRING MANIPULATION

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Write a program that will read in a line of textand output the number of words in the line and

the number of occurrences of each of the letter.Ask the user to enter any word to be any string of

letters that is delimited at each end by eitherwhitespace, a period, a comma or the beginning

or end of the line. Assume that the input consistsentirely of letters, whitespace, commas, and

periods. In displaying the number of letters thatoccur in a line, be sure to count uppercase and

lowercase versions of a letter as the same letter.Finally, display the letters in alphabetical orderand list by only those letters that occur in the

input line.14

Lab. Exer 1


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Lab. Exer 1

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Lab Exer 2

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Practical Exam 1

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Write a program to convert ordinary Hindu-Arabic

numerals to Roman numerals and vice-versa( I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, and

M = 1000)

Sample output:

Enter an Arabic number: 30

Equivalent Roman numeral is: XXX


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Practical Exam 2

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Write a program that will ask the user to enter the last names of

four candidates in a class officers president election and the

number of votes received by each candidate. Afterwards, yourprogram should display each candidates name, the number and

the percentage of the total votes received by the candidate.


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LABORATORY EXERCISE

CHARACTER MANIPULATION

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Practical Exam 3

6- String and C String Manipulation

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