C :: Copying Characters From One String To Another With Pointers?

Apr 14, 2013

So I'm writing a function isPalindrome() that can accept a string as an argument, and copy from it only the alphabetic characters in the argument (original) string to another string named alpha_array which contains only the alphabetic characters. Then the function should be able to call the isPurePalindrome function to determine if alpha_array is an ordinary palindrome.

The problem is that when I call isPalindrome in main, the program crashes.

Here's the code I have for isPurePalindrome and isPalindrome:

Code:

/* 1 */
int isPurePalindrome( const char * sentence ) // Can accept strings, array and pointer arguments
{
// Declarations

[Code].....

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C++ :: ERROR Copying Array - Pointers

Jan 31, 2014

I was trying to copy one array to another one of the same size, but when I execute the program all the array values that are supposed to be copied appeared to be 0 when it should be 10, what am I doing wrong?

#include <iostream>
#include <cstdlib>
using namespace std;
int a[10];
int b[10];
void print(int *, int);
void zeros (int *, int);

[Code]...

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C :: Copying String To Clipboard?

Jun 6, 2014

How to make a C function, that will be copying string to the clipboard?(so during execution it copies to cliboard, and after the program ends its execution I will be able to do "Ctrl-V" and paste the things copied)?.

I assume that linux have some sort of in-kernel clipboard which can be filled with some systemcall?

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C :: Splitting String And Copying It Over To A Struct

Sep 26, 2013

I'm having trouble with this code. What I'm trying to do is to read a line from a file and cut that line into two pieces, one is the keyword and the other is the definition. I want to read up to when there is a dash and assign that line to key and then assign the rest of the line to def. After that I copy key to the struct DictEntries.key and def to DictEntries.def. The output of this shows only the definition for both DictEntries.key and DictEntries.def but if I use "puts(key);" I see the keyword.

Code:

while(!feof(dictionary))
{
char line[200];
char *key,*def;
fgets(line,sizeof(line),dictionary);
key = strtok(line,"-");
}

[code]....

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C :: How To Print Characters But No String Just Array Of Characters

Mar 20, 2014

so my question is i want to print characters,no string just an array of characters,i do this but it s not working,maybe i have to put the '' at the end?

Code:

int main() {
int i;
char ch[5];
for(i = 0; i < 5; i++) {
scanf("%c",&ch[i]);

[Code]...

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C/C++ :: Find The Common Characters Between Two String Characters

Jul 6, 2014

Im supposed to find the common characters between two string characters, assuming that the user wont input duplicate letters like ddog. When I run my code I get an output of a question mark upside down. Here is my code with comments on what each part is supposed to do

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(){
char str1[20], str2[20],remp = '';
int size1,i,j,temp;
printf ("Input the first string");

[Code]...

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C++ :: Vector Of Void Pointers Which Point To Array Of Characters

Jan 21, 2014

This code work perfectly, as follows.

Code #A:

#include <iostream>
#include <cstring>
#include <vector>
using namespace std;
typedef std::vector <void *> gr_vector_void_star;
gr_vector_void_star output_items;

[Code] .....

Output of above code #A:

char * sentence = "Angel";
for (int i=0; i < 5; i++)
{ out[i] = sentence[i]; } // error: invalid conversion from 'char' to 'char*' [-fpermissive]

It fails to compile with error message "invalid conversion from 'char' to 'char*'".

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C :: Comparing Of Characters In Given String From Input String?

Feb 7, 2013

I am stuck in this program, Be given a string of chars, where each single char belongs to the following alphabet: a..zA..Z0..9 (So, in the string there are only lowercases, uppercases and digits. No blank, no comma, ...). For every char of the given alphabet, count how many times in the string

1-- the char belong to a sequence of identical chars whose length is at least three (i.e.: in the string cc74uyrpfccc348fhsjcccc3848djccccc484jd for three times the character 'c' satisfies this condition)

Code:
#include<stdio.h>
#include<conio.h>
#include<string.h>

[Code]...

2-what is the longest substring of characters strictly rising interm of ASCII code(the following is greater (>) of the previous)

3- what is the longest substring of successive characters interm of given string rannge (i.e.: fhkjshdfruytyzABCDEfglsj => 7)

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C/C++ :: Copying A String From A Pointer To New Pointer

Mar 4, 2015

I need to make a copy of a string that is defined by char *full and copy it into a different pointer defined by char *duplicate. I have written code to do this however it will not work and i cannot figure it out my code is as follows:

char *duplicate = (char *)malloc(strlen(full) + 1);
strcpy(duplicate, full); /*Make second version of full*/
char *Ptr = strtok(duplicate, " "); /*Split duplicate up*/

I have a full program written but i know this is where the problem is because i have used printf statements to see where the program fails. I get no errors and it compiles successfully but it hits this point of the program and it just stops and windows automatically shuts down the program.

char *full is pointing to:
"To be, or not to be? That is the question:
Whether 'tis nobler in the mind to suffer
The slings and arrows of outrageous fortune,
Or to take arms against a sea of troubles,"

I need to duplicate the string because i need to use strtok but i will need the original string later on so i need an unaltered version.

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C/C++ :: How To Initialize Array Of Pointers To Array Of Characters

May 21, 2014

I am trying to initialize an array of pointers to an array of characters, I can do it in 3 lines but I really want to do it in one line at the same time keeping the #define.

3 lines initialization (can compile)
======================
#define A 1
#define B 2
char row1[] = {A|B, B, A};
char row2[] = {B, A};
char *test[]= {row1, row2};

1 line initialization (failed)
===============================
char *test[] = { {A|B, B, A}, {B, A} }; // <- how do i do this??

I do not want this because it waste ROM space
=============================================
char test[][3] = { {A|B, B, A}, {B, A} };

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C++ :: Reading Characters From String

Apr 13, 2013

i have a string which is n characters long. i need to read say 20 characters at a time, wait for the user to type OK and then send another 20 characters. wait for the user to type OK and send 20 characters again until we get to the nth character.

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C++ :: Removing Characters From A String

Nov 1, 2013

I want to remove a particular character from a string. Say '.'. I've tried the following:

void removeDots(std::string &x)
{
std::remove_if(x.begin(),x.end(),[](char c){return (c == '.');});
}

This has the effect of removing the dots but keeping the length of the string the same, so old characters are left over at the end. Is there an extra action to do to x to make it the right size or is there a better way of doing it?

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C++ :: Reversing N Characters In A String?

Dec 26, 2013

I have a string like str="ABCDEFGHIJK";

need o/p like this str="CBAFEDIHGJK"

am getting "CBA" correctly after that its not printing anything.

int main()
{
string str="ABCDEFGHIJK";
char str1[10],rev[10];
int n=str.length(),count=0,c=3,k=0,j=0;

[Code].....

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C/C++ :: How To Uppercase All Characters Of A String

Oct 28, 2014

I'm working on a programming challenge and i need to uppercase all characters of the string.

string upperCaseIt(string& name){
for(int index = 0; index < name.length(); index++){
name[index] = toupper(name[index]);
return name;
}
}

My problem is that it only uppercase the first character of the string.

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C/C++ :: How To Cout The String Characters Themselves

May 11, 2014

Iam working with arrays and i cant get to the write solution to cout the characters.

the Question is : Write a program that inputs a character string from the user as an input (using cin.get())and store it in myStr[ ] array.Assume that the length of the input string is less than 100 characters and the string may contain lower case, upper case, and/or symbols.The program should then print the number of lower case, upper case, digits, and symbols along with the characters themselves.

my code :

#include <iostream>
#include <string>
#include<iomanip>
using namespace std;
int main() {
int ctr1=0, ctr2=0, i=0, ctr3=0;

[Code] ...

What i have now, how can i cout the uppercase characters and the lower case characters and the symbol characters !

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C/C++ :: How To Ignore Certain Characters In A String

Sep 18, 2014

I am trying to cout just the first 5 characters the user enters into a string. I'm not sure how I can discard or not show the rest of the characters they try to enter after 5.

#include <iostream>
#include <string>
using namespace std;
int main() {
string random;
cout << "Enter any word." << endl;
cin >> random;
cout << random; //want to ignore everything after first 5 characters entered.
return 0;
}

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C/C++ :: Delete Last 4 Characters From Given String

Mar 29, 2012

x="A4478596895";

Delete last four characters.

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C :: Entering Characters Into A String Pointer

Feb 8, 2013

1. The debugger shows that the characters are entered into the word pointer, and when a punctuation or space character is encountered, I terminate the string with a ''. But when I use puts to print the string, garbage is printed. Why is this?

2. Also, if I don't allocate memory for word the compiler gives a warning about it being used uninitialised. But I didn't allocate memory for the array of pointers(words), and the compiler didn't give any warnings. Whats the difference between a pointer and an array of pointers?

Code:

// wordcount.c - count words.
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>

[Code]....

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C :: Create A Function That Will Take A String Of Characters

Dec 7, 2013

I can not cope with the task.Create a function that will take a string of characters (including spaces) and print the numbers of characters (including commas, periods, etc.) in it. The output will be arranged alphabetically. Distinguish case sensitive!

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C :: Print String With Escape Characters

Mar 7, 2013

is there any function to print a string with all the escape characters in it?

For example, instead of printing:
This is a string.

It would print:
This is a string.

Or in Windows:
This is a string.

I know that you can debug the code to find the variable contents, but is there any way to accomplish this with some standard library function?

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C++ :: Error Reading Characters Of String

Feb 2, 2013

#include<fstream>
#include<Windows.h>
#include<cstdlib>
#include<iostream>
#include<string>
#include<iomanip>
#include<sstream>

using namespace std;

void add_matrix(int row1,int row2,int col1,int col2,double m1[30][30],double m2[30][30],double m3[30][30]);

[Code] .....

This program is suppose to read a matrix file , and the first getline is suppose to get the file header but it appears that 'line' doesn't take in any value other than empty thus causing all the problem , I tried to put cin.getline() in front of it to take away the /n created by the cin before it , but it doesn't work . When I debug the program when the arrow points to the string line , this error appears

line<Error reading characters of string.>std::basic_string<char,std::char_traits<char>,std::allocator<char> >

I tried to initialize string line=NULL too , doesn't work either.

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C++ :: Reading String 2 Characters At A Time?

May 10, 2013

may i know how do i read a string 2 characters at a time?

lets say i have a for loop like this

for(int i=0;i<stringLen;i++)
{
for(int j=0;j<???;j++)
{
//insert code
}
}

what i want to do is i want to read a string 2 characters at a time and store them into a vector.

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C/C++ :: Count Numbers And Characters In A String

Sep 2, 2014

I have a upcoming C++ exam. I would like to write a program to convert INDIVIDUAL digits into words.

E.g 678 = six seven eight[/size][/b]

I have the following code:

//Program to print individual digits in words
#include<iostream>
using namespace std;
int main() {
int num;
cout << "Enter a number between 0 and 9999: ";

[Code] ....

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C# :: Splitting Characters Within String Array

Sep 23, 2014

I have the following string array

string[] output= input.toArray();

each index has a set of two characters, for example:

output[0] has 'th', output[1] has 'is'

I want to take t and h and compare them or do anything with them, but it must be in pairs.

I tried foreach but I don't know if there is a way to compare the element with the next element .

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C/C++ :: String Prints Unusual Characters?

Sep 10, 2014

The print statement below I commented prints out unusual characters. I have two strings from the command line that I pass to the TKCreate function. Inside the function the strings print out fine, but when I return a pointer to the struct back to the main method one of the strings prints out fine, but the other one prints out unusual inconsistent characters.

#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>

[Code]....

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C++ :: Finding If String Has Unique Characters

Mar 28, 2013

bool isUnique(string _str)
{
bool char_set[256];
int len = _str.length();
memset(char_set, '/0', 256);
for(int i = 0; i < len; ++i)

[Code] .....

I came across this code to find if string has unique characters...i didnt understand why they subracted ascii value of character '0' in the statement int val = _str[i]- '0' and what is happening with the statements...

if(char_set[val])
{
return false;
}
char_set[val] = true;

I take each character in the sting and traverse the whole string .and if count is 2 i use break and conclude that its not unique and not otherwise...can i use this method or this is not efficient????

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