Please make sure you supply the correct -std flag when compiling. The default setting that Orwell Dev-C++ uses (don’t pass any -std option), will not enable some shiny new C++11 functions, like unique_ptr. The fix is quite simple: For non-project compilations, go to: Tools >> Compiler Options >> (select your compiler) >> Settings >> Code … Read more
Use the Win32API GetUserName function. Example: #include <windows.h> #include <Lmcons.h> char username[UNLEN+1]; DWORD username_len = UNLEN+1; GetUserName(username, &username_len);
The following code snippet is not complete, and contains lots of hidden assumptions and bugs. I wrote it from scratch for a university course project from mere observation, where it minimally fulfilled all the requirements. I didn’t work on it any more, because there must be libraries that would do the job way better. Here … Read more
Since you’re declaring those variables in the header file, and including the header file in each C++ file, each C++ file has its own copy of them. The usual way around this is to not declare any variables within header files. Instead, declare them in a single C++ file, and declare them as extern in … Read more
Go to Tools -> Compiler Options -> “Compiler” tab Check the checkbox labeled, “Add the following commands when calling the compiler” And add in the text entry box, “-std=c++11” or if that doesn’t work “-std=C++0x“ Should be something like that anyway, I haven’t had Dev C++ installed for many years, so I had to look … Read more
For pure C++ You can’t. C++ doesn’t even have the concept of a console. The program could be printing to a printer, outputting straight to a file, or being redirected to the input of another program for all it cares. Even if you could clear the console in C++, it would make those cases significantly … Read more
The code contains a typo. In this statement scand(“%f”,&Centimeters); there shall be scanf instead of scand. scanf(“%f”,&Centimeters);
This line printf(“(%s)”,’Hi. It’s thread number 1′); should be printf(“(%s)”, “Hi. It’s thread number 1”); String literals are enclosed using quotation marks “. Also passing 1 to pthread_join() as 2nd parameter most likley invokes undefined behaviour, as it tells the function to write a value of type void * to address 1, which is not … Read more
New code that works: #include <stdio.h> #include <conio.h> #include <string.h> #include <stdlib.h> #include <time.h> int main() { int i,j=0,code,amt, key,lines=0; int id[100],stock[100],k=0; char name[100][20],product[100]; float price[100],sum; float total=0; char ipname[100][20]; int quantity[100], ch; float ipprice[100]; float ipsub[100]; FILE*fp1; fp1=fopen(“Fruit.txt”,”r”); if(fp1==NULL) { printf(“ERROR in opening file\n”); return 1; } else { while((ch=getc(fp1))!=EOF) { if(ch==’\n’) lines++; } … Read more
if x is a float type or an integer type std::cin >> x; reads no letter from std::cin if std::cin starts with a character that cannot be a prefix for a float or an integer type. So x remains to 0 and your input stream remains unchanged. For the next std::cin >> y; with y … Read more