When passing a char* as an argument to a function, should the called function do a free on that string? Otherwise the data would be "lost" right and the program would leak data. Or are char* handled in a special way by the compiler to avoid everyone from having to do free all the time and automatically deletes it one it goes out of scope...
hi all, I use this code to read data from sqlite database: keyFromSql = [NSString stringWithCString:(char *)sqlite3_column_text(preparedStatement, 1)]; but the compiler give me the warning wrote in the title... so, what is the right and not deprecated method to retrieve a value from sqlite? thanks! ...
char *p = " woohoo"; int condition = /* some calculation applied to p */ /* to look for all 0x20/blanks/spaces only */ if (condition) { } else { printf("not "); } printf("all spaces\n"); ...
I have a function defined a local variable typed in CStringW, is it safe to return this object to the caller by value, not by reference? ...
How can I convert a BYTE array in a CString in MFC> ...
I need to hold an array of C strings. Now I know C strings are just an array of chars so essentially what I want is a 2d array of chars. The strings I'm trying to store will also never exceed 6 characters. My plan is to initialize a char array with 50 "string slots" and then if I hit 50 strings reallocate the array's memory to double it'...
I need to check whether my CString object in MFC ends with a specific string. I know that boost::algorithm has many functions meant for string manipulation and that in the header boost/algorithm/string/predicate.hpp could it be used for that purpose. I usually use this library with std::string. Do you know a convenient way to use this ...
Hi I'm trying to make a program that read a file line by line and then put the readed line into a a linked list, my problem is to add the string to list. Look at the code, in the else test you can see my problem. #include<stdlib.h> #include<stdio.h> struct list_el { char *ord; struct list_el * next; }; typedef struct list_...
Hi All I having an issue in using Boost regex with a MFC CString. The regex is very simple: it must check if the string ends with the name of a dll I am looking for. In the code below the CString Path DOES contain the dll I am looking for, but I don't know why the regex is failing. Uisng ReleaseBuffer increases the buffer size so the L...
Hi I am trying to make a very easy converter/compressor; the program should take a file with 4 different types of ASCII characters and writ it out as binary to a file. The program should also read the binary file and convert it to ASCII and print it out on the screen. Under is my code, I can’t really get the char/cstring. What types of ...
Hey all, Quick C question here. We've been playing with double, triple, even quadruple pointers recently. We though we had a grasp on things until we ran into this problem... char ***data; data_generator(&data); char **temp = data[0]; printf("printing temp[%d]: %s\n",0, temp[0]); printf("printing temp[%d]: %s\n",1, temp[1]); ...
I need to build up a path to a file. I have the following class method: void Directory::scanDirectory(char *directory) { DIR *dirp; struct dirent *entry; char path[1]; if(dirp = opendir(directory)) { while(entry = readdir(dirp)) { if (entry->d_name[0] != '.') { strcpy(path, directory)...
I have a private attribute in a class that is defined as vector<pair<char *, int> > data;. I add data to this vector with data.push_back(make_pair(p, r));. Later when I go to get the data out of the vector I get bad data for the p value. The data returned is like ��U3. I think this is because a pointer to the char array is being stored. ...
I am having a problem, but I cannot figure out what I'm doing wrong. I'm not sure if it's a problem with my loop, or the cin buffer is not being cleaned. I am doing a program that transforms a C-style string to uppercase, however if the user enters more than 11 characters, then the function should only display the first 11, and anything ...
I want to read a value from registry using the following method: char* cDriveStatus=ReadFromRegistry(HKEY_CURRENT_USER,_T(NDSPATH),m_szDriveName); I tried converting using GetBuffer,m_szDriveName.GetBuffer(0) but this again shows error: error C2664: cannot convert parameter 3 from 'wchar_t *' to 'LPSTR' Edit: Declaration of Met...
I have the following code , which gets a return value from a function as char* cDestDrive = ReadFromRegistry(HKEY_CURRENT_USER,NDSPATH,szDestPathRoot); I am able to read the value inside cDestDrive till the time I am assigning it. The moment I am assigning it: CString strServerAddress = cDestDrive; the value of cDestDrive gets ch...