C++ :: Using Bitmask Operators - String Bin To Char

Mar 3, 2013

So this is the code I have so far which puts a bitmask seperator base on what I choose. My problem is when Im trying to do them in this manner.

1. 0 to 31, with minimum width set to 8, and separating between every 4 digits.
2. 2^0 to 2^16, with minimum width set to 17, separating between every 8 digits.
3. (2^0-1) to (2^16-1) with minimum width set to 16, and no seperation between digits.

I try doing number 2 called "String multyplyByTwo" but seems to be getting errors.

#include<iostream>
#include<string>
using namespace std;
string binToChar( const int n, unsigned minWidth = 8, unsigned sepMask = 0x11111110 ) {

[Code] ....

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C++ :: Overloading Char And String Operators?

Dec 20, 2013

I build a nice class that i need the output be possible in char * and in string. But how I can do for the compiler don't be confused between them?

Code:
operator char*() {
return (char *) result.c_str();
}

These works fine. and for string, i must casting it. but i want do anotherone for string... how can i do it? I tried:

Code:
operator string() {
return result;
}

But the compiler stays confused or something

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C# :: Calculator With Buttons - When Click Numbers Or Operators It Goes To String Array

Mar 26, 2012

I have a calculator with buttons, and when I click the numbers or operators, it goes to a string array. So;

Press 3
Press +
Press 2
Press =

and my array is str[0]='3' str[1]=.... so on...

And also I have a C code which calculates the string you entered with some algorhytms and gives a double value as a result. So the question is;

How can I send my STR array in C# to my C program? I mean I want to use my C program as a source code. and How to return that double value to my C# program?

For now, I don't want to change my C codes into C# codes. I want it to keep as is. Just use it as a source code. Is that possible?

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C++ :: Count String In A String Using Datatype Char

Dec 20, 2014

I have the codes for such a problem where, to create a program that counts how many times the second string appears on the first string. Yes it counts if you put 1 letter only, but if you put 2, it is an error. As an example. If the first string is Harry Partear, and the second string is ar, it must count as 3. Here's the code:

Code:

#include <iostream>
#include <conio.h>
using namespace std;
int main ()

[Code] ....

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C++ :: Char Array To String - String Becomes Garbage

Apr 20, 2013

I'm trying to "tokenize" a string using std::string functions, but I stored the text in a char array. When I try to convert it to a string, the string has the first character right but the rest is garbage.

// Get value from ListBox.
char selectedValue[256];
memset(selectedValue, NULL, 256);
SendMessage(GetDlgItem(hWnd, IDC_LB_CURRENTSCRIPT), LB_GETTEXT, selectedIndex, (LPARAM)selectedValue);
// Convert to string.
string val(selectedValue);

[Code] ....

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C++ :: String Class That Finds A Char In String?

Feb 5, 2013

A string class that finds a char in the string?

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C++ :: Getting A Char From A String

Apr 5, 2013

I have this problem that I don't know how to sort out. I have a feeling it's really simple

#include <iostream>
#include <string>
void main () {
char test[10] = "gorilla";
char try = test[1];
cout << try;
}

I get the error:
lab4.cpp:6: error: expected primary-expression before "char"
lab4.cpp:6: error: expected `;' before "char""

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C :: How To Get ASCII Value Of A Char In A String

Mar 4, 2013

how can I find ASCII value (0..255) of a character char in a string?

I have an array of char:

Code: char myarray[50]; and I need to have ASCII value of character eg myarray[10]. How can I do that?

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C++ :: Char Array To String

Oct 19, 2013

I have some code:

char cHomeTeamFaceOffsPercentageWon[100];
memcpy(cHomeTeamFaceOffsPercentageWon,cSqlHomeTeamFaceOffsPercentageWon,100);

After this, for example, cHomeTeamFaceOffsPercentageWon is, "29%".

Then, I use

std::string szwPercentageWon = std::string(cHomeTeamFaceOffsPercentageWon);

szwPercentageWon is then, "2". Shouldn't this convert correctly, to "29%" as well.

Or is there something I'm missing? Maybe the termination character, or something.

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C++ :: Convert String To Char

Apr 30, 2013

Is there anyway to convert std::string to char*?

Like:

std::string x="hello world";
char* y=x;

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C++ :: How To Transform A String Into A Char

Feb 8, 2015

I have had quite a head spinner on trying to transform a string into a char. I've been trying to do this for the project below.

[URL] ....

std::string str = "string";
const char* chr = str.c_str();
cout << *chr << endl;

Above is the code I have tried using and it stores data under *chr, it however only stores one letter rather than the entire word like for example string.

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C++ :: Convert String Of Hex To Char

Jul 5, 2013

I have this code working:

char tmp_wku[3];
tmp_wku[0]=0x01;
tmp_wku[1]=0x9D;
tmp_wku[2]=0x62;
char tmp_com[11];

[Code] ....

This sends the buffer to a LIN modem. My question is: can this be done better. If I have a astring of hex numbers like "09 98 88 55 42 FF 00 00 FF BD 89". How could I send this without manually makng a char with hex numbers?

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C++ :: Replace Char In String

May 7, 2013

Is there a way to replace 3 char's in a string. For example i have a string containing

s = "The school is called 7x8"

I want to replace the "7x8" with "LSU". But the "x" can be any letter or number.

Is there a way to do that ?

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C++ :: Remove Char From String?

Aug 9, 2013

I've to do a function that removes char(input by user) from string , only if it appeared and to reduce spaces.

for instance: string = abcabcd ; and the char= c/
the return string is : ababd

void removeChar(char string2[SIZE], char ch) {
//---NOTE--- its not completely works - there is a problem i.
int read = 0, write = 0;

[Code].....

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C++ :: Conversion Between Char And String

Jun 7, 2013

I have a question on conversion between char & string. I have cut & pasted the part of the code from my C++ code and my function "decryptPwd" uses C style code with "char" etc.

I need to pass a string (mypwd) somehow to this function after conversion & then compare it to another string (newmypwd).

I tried - "decryptPwd(mypwd.c_str())==newmypwd.c_str()" but it did not work.

..
#include <string>
..
char* decryptPwd(char hash[64]);
main () {
string mypwd;
string newmypwd;
if (decryptPwd(mypwd)==newmypwd)

[Code] ...

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C/C++ :: Appending Char To String

Dec 1, 2013

#include <stdio.h>
#include <stdlib.h>
#include <string.h>  
int main() {
    char states [6][10]={"start","InNum","InID","Done","InASG","InCOM"};
    char state[] = "start";

[Code] .....

I am trying to take each character from a file and put it in a string and print this string but when i write this code , it doesn't give any output.

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C++ :: Binary Char Pointer Into String

Jun 12, 2013

Is there a more simple method to copy Buf into str? Buf is a binary string.

Code:
void function(string & str) {
int iWholeSize = 512;
char * Buf = new char[iWholeSize];
.... operations on Buf
string s(Buf, Buf + iWholeSize);
str = s;
}

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C++ :: Converting String To Char Array

Mar 30, 2014

In this program, I have to ask the user for an employee, then the program will check to see if the file for that employee exist, if it doesnt then it will automatically create the file.

ReadNew function reads the file....check to see if it exist

CreateNew function creates a new file.

In my code I have no problem with the first part of reading file.. and my createnew function works in other programs where I am asking for input of file name to create the file name. However in this code I cannot figure how to automatically pass the input filename from the ReadNew function to the CreateNew function. I can't ask the user to enter the name a second time, so I have to pass the input filename into both functions. Here is my code.

Code:

//Create a file, append to it, and read it.
#include <iostream>
#include <fstream>
#include <string.h>
#include <stdio.h>
using namespace std;
char filename[256];
string n;
string filelist;
void CreateNew(ofstream & FileNew);

[Code]...

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C :: Printing A Char String From A Struct

Jan 3, 2015

I am trying to save 5 persons names to a struct, and then printing them afterwards, shortly before the program ends. I tried to print the char string out right after it has been copied over, and it showed fine, but when i try to write it out right at the end of the program (its in a separate function) the terminal just prints gibberish.

the function looks like this:

Code:
int printUser(){
printf("Following patients have been recorded in this session:
");
struct database patient1;
struct database patient2;
struct database patient3;

[Code]...

the output looks like this(as you can se in under structest, that it shows the correct string, it also uses printf):

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C :: Convert Char Array To String

Oct 15, 2013

Currently I have:

Code:
char my_array[4] = { '1', '2', '3', '4' };

how do I convert the above to a string of: "1234"

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C :: How To Delete All Occurrences Of A Char In A String

May 17, 2014

I want do delete all occurrences of a char in a given string, but I really don't see my error in the code. Here is how I did it:

Code:

char *input = "example_string";
int len = strlen(input);
char *new_line[len];
char bad = 'e'; //the one to delete
int i;
int j = 0;

[Code]...

I get segmentation or bus errors.. And I also don#t understand the warning I get. new_line is an array of chars, and I am trying to assign to it a certain char.

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C :: Best Way To Store Input String Into Char

Sep 16, 2013

I'm extremely rusty at C but is this the best way to store an input string into a char*?

Code:
int length = 100; //initial size Code: char * name = malloc(length * sizeof(char)); //allocate mem for 100 chars
int count = 0; //to keep track of how many chars have been used
char c; // to store the current char

while((c = getchar()) != '
'){ //keep reading until a newline
if(count >= length)

name = realloc(name, (length += 10) * sizeof(char)); //add room for 10 more chars
name[count++] = c
}

Is this a good way and what could be better?

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C :: How To Convert A String Into 2D Char Array

Mar 8, 2013

.I have this string that I need to convert into a 2d char array like this:

String str= "A,E,B,I,M,Y#N,R,C,A,T,S";

I know how to use delimiter and split string and I know how to convert but only from string to char[].I need something like this:

Input: String str= "A,E,B,I,M,Y#N,R,C,A,T,S";

Output: [A] [E] [B] [I] [M] [Y][N] [R] [C] [A] [T] [S]

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C :: Printing A String On A Char Matrix

May 27, 2014

So I have an array of char called s.This array has many words inside, each one separated by ''.The words are sorted by length (from bigger to smaller).I have have a char matrix with random things inside (it was not initialized) caled mat.I want to copy the first word from the array s to the matrix mat.

Code:

int nlin, ncol; /*number of lines and collumns.*/
int c,l,a,q;
char mat [1000][1000];
char s[1000];
}

[code]....

I can't see where this is wrong, but, when i test it, it clearly is not right. for example, if the input is 3 lines and 3 columns for the matrix and the word is crate, the output is :

cra
t
e

but it should be:

cra
t
e

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C :: Searching A String On Char Matrix

Apr 12, 2014

I want to make a program that receives the number of lines and collumns of a matrix, a matrix of char, the number of pairs of coordinates and the coordinates. the program has to return the char (or chars) that are on those coordinates on the matrix.

Example:

receives
2 3 ABC DEF 2 1 1 1 2

returns

AB

this is how i tried to solve this problem:

Code:
#include
#define MAX 1000
int main() {
int nlin, ncol;
char mat[MAX][MAX];
int x[MAX], y[MAX];
int ncoords;
int l, c, n;

/* receiving variables and storing matrix.*/

[Code] .....

For some reason that i can't seem to find, this solution is not right.

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C++ :: Assign Value Of Pow (2,800) To Char Array Or String

Jan 31, 2015

Assign value of pow(2,800) to char array or string ....

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