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May 8th, 2006, 8:47 AM
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#1 |
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Newbie
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How to go about starting this program?
Here's what I have to do. Can anyone give me an idea on what I should do to do this?
Write a program that counts the number of letters, digits (0-9), and common puncuation symbols entered by the user. Stop inputting when the user presses ENTER. Use a switch statement to categorize the characters into puncuation, digits, and letters. When the program ends, report the number of characters in each category. (If you like, simply assume that, if a character is not a digit or puncuation, it is a letter. Also, just use the most common puncuation symbols (. , ? ! :  . |
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May 8th, 2006, 8:56 AM
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#2 |
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Programming Guru
 
Join Date: Jul 2004
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#include <iostream>
#include <cctype>
using namespace std;
int main (void)
{
// use isdigit, isalpha, etc.
return 0;
}Edited to remove the deprecated header. oops... 
__________________
http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root." Last edited by Infinite Recursion; May 8th, 2006 at 9:14 AM. |
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May 8th, 2006, 9:05 AM
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#3 |
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I eat cake for breakfast.
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* thwaps IR *
Bad, bad! Use the cctype header instead of ctype.h - the former is a C++ library, and the latter is a C library. The only difference is that in the C++ version, everything is in the std namespace. As IR points out, this library contains a number of functions designed to do exactly what you want to do: isalpha checks whether the character passed to it is a letter, for example. For punctuation, you'll have to check 'em manually: switch (character)
{
case '.':
case '?':
[...]
// do stuff
break;
} |
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May 8th, 2006, 9:18 AM
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#4 |
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Newbie
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Yeah we're (lilmul123) wondering how to do this.
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May 8th, 2006, 9:19 AM
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#5 |
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I eat cake for breakfast.
Join Date: Jul 2004
Location: In my box.
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Try reading the responses.
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May 8th, 2006, 9:20 AM
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#6 |
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Newbie
Join Date: Mar 2006
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well, here's what I have thus far. can you tell me if i'm on the right track or not? i dont exactly know how to use the isdigit or isalpha statements.
#include "conio.h"
#include "stdio.h"
#include "iostream.h"
#include "ctype.h"
void main()
{
char addup,dothis;
int lettercnt;
clrscr();
cout << "Please enter a bunch of characters, puncuation, or numbers: \n";
cin >> addup;
addup = getch();
{
switch(addup)
{
case 'a'||'e'||'i'||'o'||'u':
lettercnt++;
break;
}
{
cout << "You typed this many characters: " << lettercnt;
}
getch();
}
} |
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May 8th, 2006, 9:23 AM
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#7 |
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I eat cake for breakfast.
Join Date: Jul 2004
Location: In my box.
Posts: 4,434
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Looks alright. A switch-case block doesn't work like that though.
switch (addup)
{
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':
// do stuff
break;
case '0':
case '1':
[...]
case '9':
// do other stuff
break;
default:
// nothing useful happened - do other stuff
} |
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May 8th, 2006, 9:24 AM
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#8 | |
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Resident Grouch
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Posts: 6,453
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Quote:
__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
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May 8th, 2006, 9:26 AM
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#9 |
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Programming Guru
Join Date: Jul 2004
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An alternative to the switch statement for symbols would be to base if off ASCII ranges or have a string of symbols and utilize the "find_first_of" function.
bool isSymbol (char x)
{
string SYMBOLS = "X ~`!@#$%^&*()_+-={}[]:\";'<>?,./|";
bool result = false;
int location = 0;
location = SYMBOLS.find_first_of(x);
if (location > 0)
result = true;
return result;
}
__________________
http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root." |
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May 8th, 2006, 9:29 AM
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#10 |
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Resident Grouch
Join Date: Jun 2005
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isalnum
Tests whether an element in a locale is an alphabetic or a numeric character. isalpha Tests whether an element in a locale is alphabetic character. iscntrl Tests whether an element in a locale is a control character. isdigit Tests whether an element in a locale is a numeric character. isgraph Tests whether an element in a locale is an alphanumeric or punctuation character. islower Tests whether an element in a locale is lower case. isprint Tests whether an element in a locale is a printable character. ispunct Tests whether an element in a locale is a punctuation character. isspace Tests whether an element in a locale is a whitespace character. isupper Tests whether an element in a locale is upper case. isxdigit Tests whether an element in a locale is a character used to represent a hexadecimal number.
__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
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