Here is a test reproducing the problem: This produces the following error on GCC 4.8.4: Note that on GCC 6.2.0 the errors related to this question disappear, and it instead produces just: This has been reported a number of times by a number of users, on Stack Overflow, and elsewhere. I would like to understand … Read more
The problem here is that you are including commands.c in commands.h before the function prototype. Therefore, the C pre-processor inserts the content of commands.c into commands.h before the function prototype. commands.c contains the function definition. As a result, the function definition ends up before than the function declaration causing the error. The content of commands.h … Read more
You’re overstepping the array. Either change <= to < or alloc SIZE + 1 elements Your malloc is wrong, you’ll want sizeof(double) instead of sizeof(double *) As ouah comments, although not directly linked to your corruption problem, you’re using *(ptr+tcount) without initializing it Just as a style note, you might want to use ptr[tcount] instead … Read more
I’ve had nice results with djb2 by Dan Bernstein.
The elegant way: The slightly ugly way: The slightly strange way: Note that the strtok function doesn’t work as expected if the user enters an empty string (i.e. presses only Enter). It leaves the \n character intact. There are others as well, of course.
You have your printing loop inside your reading loop. It is trying to print out all of the trip information after reading the first one in. Edit: The trouble here is that the way scanf handles single characters is kinda unintuitive next to the way it handles strings and numbers. It reads the very next … Read more
You can use c[i]= ‘\0’ or simply c[i] = (char) 0. The null/empty char is simply a value of zero, but can also be represented as a character with an escaped zero.
It’s a tabs problem. Some text editors may replace tabs with white spaces, make sure you use a proper text editor that doesn’t mess it up. Open your makefile in vi or any other rudimentary editor, and rewrite that makefile. Note that after each target rule, one single tab must be placed in the beginning … Read more
char* and char[] are different types, but it’s not immediately apparent in all cases. This is because arrays decay into pointers, meaning that if an expression of type char[] is provided where one of type char* is expected, the compiler automatically converts the array into a pointer to its first element. Your example function printSomething … Read more
The second parameter is the format string after which the format arguments follow: %f tells fprintf to write this argument (amount) as string representation of the float value. A list of possible format specifiers can (for example) be found here.