How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “hello”?
Can I specify that I want gdb to break at line x when char* x points to a string whose value equals “hello”? … Read more
C
Warning/error “function declaration isn’t a prototype”
I have a library I created, File mylib.c: #include <mylib.h> int testlib() { printf(“Hello, World!\n”); return (0); } File mylib.h: #include <stdio.h> extern … Read more
What’s an object file in C?
I am reading about libraries in C but I have not yet found an explanation on what an object file is. What’s the … Read more
Is there an alternative sleep function in C to milliseconds?
I have some source code that was compiled on Windows. I am converting it to run on Red Hat Linux. The source code … Read more
memcpy() vs memmove()
I am trying to understand the difference between memcpy() and memmove(), and I have read the text that memcpy() doesn’t take care of … Read more
Is gcc’s __attribute__((packed)) / #pragma pack unsafe?
In C, the compiler will lay out members of a struct in the order in which they’re declared, with possible padding bytes inserted … Read more
Can’t compile C program on a Mac after upgrade to Mojave
I have used the gcc command on the terminal to compile C programs but all of a sudden, after an update to my … Read more
Split string with delimiters in C
How do I write a function to split and return an array for a string with delimiters in the C programming language? char* … Read more
What’s the difference between “mod” and “remainder”?
My friend said that there are differences between “mod” and “remainder”. If so, what are those differences in C and C++? Does ‘%’ … Read more
Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
Why is it that scanf() needs the l in “%lf” when reading a double, when printf() can use “%f” regardless of whether its … Read more
