A lowercase -l is a linker option used to specify libraries. They might look like libsomething.a and becomes -lsomething in the linker invocation. In order to add a directory to the header search path, use a capital i, -I. gcc main.c -L/some/path/ffmpeg_build/lib -I/some/path/ffmpeg_build/include 1 solved Compile error when using FFMPEG library
[Edit] This is the answer to a previous version of the question, which showed the problem in action when calling these functions with argument dist==1 -(unsigned long)1 is well-defined and wraps around. It’s just ULONG_MAX. For the same reason, -(unsigned int) is UINT_MAX. Pointer arithmetic outside array bounds causes Undefined Behavior, so it’s perfectly reasonable … Read more
The code you have shown will call main infinitely, and therefore will result a stack overflow. This is true in the case of any function and not specific to main. Each function call a stack frame is created in memory, and as infinite such frames is created as the recursion goes deep, you get a … Read more
This causes undefined behaviour. strcpy may only be used between areas that do not overlap. To fix this code you could write: memmove(m+1, m, strlen(m) + 1); solved Unpredictable behavior for strcpy(m+1,m)
The safer way to implement this that doesn’t rely on knowing the internal layout of std::chrono::duration would be to copy to an integer then pass the integer to the duration: std::array<unsigned char, 6> myArray = {123, 123, 112, 0, 15}; int64_t milliseconds = 0; memcpy(&milliseconds, &myArray, 5); std::chrono::milliseconds dest{milliseconds}; 3 solved Copying to std::chrono::milliseconds with … Read more
It is normal for the compiler to generate an application! What is surprising is the location for the executable, it should have been generated in the parent directory: C:\TDM-GCC-64\> gcc Chess/chess.c Chess/init.c -o chess The explanation is interesting: You are using the Windows operating system, where the filenames are case insensitive. You instructed gcc to … Read more
I don’t know where you get your analysis from. Most parts like the abstract syntax tree is kept because it is used in all different passes. It might be that some, especially simple compilers don’t free stuff because it’s not considered necessary for a C compiler. It’s a one shot compilation unit operation and than … Read more
Ok, i figured it out. Thanks @TartanLlama for the last comment it makes total sense. So the “core error” (the thing that i wanted to know) was in here: float /* */ soma_transmissor, soma_recetor; for(i=0;i<n;i++){ soma_transmissor+=distobj[i]; /* */ } for(i=n-1,k=n;i>=0;i–){ soma_recetor+=distobj[i+1]; /* */ } I just needed to inicialize soma_transmissor and soma_recetor. Now if anyone … Read more
Here’s a step-by-step breakdown of what your code is doing: int *a; int *b; This declares two pointers to int named a and b. It does not initialize them. That means that their values are unspecified, and you should expect them to be complete garbage. You can think of them as “wild” pointers at this … Read more
this is caused because you need to link the library libgdi32.a, if you are using the DevC++, click in Tools->Compiler Options, when open the window, check the box “Add these commands to the linker command line” and in the below textbox add the text: -lgdi32 you form need to be like this: 3 solved My … Read more
Introduction If you have been writing C++ programs and have noticed that they won’t compile after you close the source and open it again, you are not alone. This is a common issue that many C++ programmers face. Fortunately, there are a few steps you can take to troubleshoot and resolve the issue. In this … Read more
Here’s the offending code in question: if (xflg) index = m * nxy + l*nx + k; fprintf(stdout,”%.1f”,index); else index = m * nxy + k*ny + l; The “if” and “else” sections of this if statement originally had one line each, so adding braces wasn’t strictly necessary. But when you added the call to … Read more
The problem with creating shellcode from C programs is not that you cannot control the assembly generated, nor something related with the code generation. The problem with creating shellcode from C programs is symbols resolution or relocation, call it whatever you like. You approach, for what I have understand, is right, you are just using … Read more
There are many uses of ! operator in Linux. See this article. In your case, it is probably to check if the a command from history is given as input. See the first point of the article. solved ‘!’ in input buffer in comparison in if statement
printf is unusual in that it has no single function signature. In other words, there’s no mechanism to automatically take the actual arguments you pass and convert them into the type that’s expected. Whatever you try to pass, gets passed. If the type you pass does not match the type expected by the corresponding format … Read more