In C the function called "main" is special, the program starts from the first instruction in this function.

Example main function:

int main(void)
{
/*first instruction to be executed goes here*/
return 0
}

The sequence of generating a program from C source code is as follows:
1. preprocessor (directives like #include etc.)
2. compiler (translates C source code to assembly)
3. assembler (translates assembly to machine code)
4. linker (embeds machine code in an executable file eg. ELF)

The knapsack problem is an example of NP-complete problems.
For any k items, each having it's own weight w we are looking for such a subset of these items, so that the sum of weights inside the subset is equal to some N. In the worst case, we must check each of the 2^k subsets. If it was possible to solve the problem in polynomial (not exponential) time, then we'd prove that P=NP and get a million $.

>>55097994
using the single line comment syntax

    //comment

or declaring the iteration counrer variable in a for loop like

    for (int i = 0; i < 10; i++) {
        ;
    }

are both invalid in ANSI C or C89
a lot of C programmers don't know this because most modern compilers default to C99

>>55098198
Ha! But I knew this. Anyway, it's cool that you wrote about it. I'm really pedantic about ANSI C in my simple programs.

On GNU/Linux OS one can easily see the USB devices by typing in the terminal emulator: lsusb

>>55098222
>I'm really pedantic about ANSI C in my simple programs.
me too, I always write a little buildscript to call the compiler with a bunch of options including -ansi so it will fail to compile if I break the C89 standard.

File: what-language-should-you-learn.jpg (1 MB, 700x8246) Image search: [Google]

1 MB, 700x8246

>>55097994

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500 KB, 1232x1404

>>55098325

>>55098398
why the tease? dump them