gcc 3.4.5

Version of implementation gcc of programming language C

Version of gcc compiler.

Examples:

Factorial - C, Objective-C (67):

This example uses recursive factorial definition. Note that 13! and larger causes an overflow, so the last lines of the output look like this:

13! = 1932053504
14! = 1278945280
15! = 2004310016
16! = 2004189184

#include <stdlib.h> /* needed for EXIT_SUCCESS */
#include <stdio.h>

unsigned long long factorial(unsigned long long n)
{
    if (n == 0) {
        return 1;
    } else {
        return n * factorial (n - 1);
    }
}

int main(void)
{
    int n;
    for (n = 0; n <= 16; n++) {
        printf("%i! = %lld\n", n, factorial(n));
    }
    return EXIT_SUCCESS;
}

Hello, World! - C, Objective-C, C++ (68):

#include <stdio.h>

int main()
{
    printf("Hello, World!\n");
    return 0;
}

Fibonacci numbers - C, Objective-C (122):

This example uses recursive definition of Fibonacci numbers. Note the difference from C++ example: loop counter must be declared outside of the loop, and printf is used for output instead of std::out. 

#include <stdio.h>

int fibonacci(int n)
{
    return ( n<=2 ? 1 : fibonacci(n-1) + fibonacci(n-2) );
}

int main(void)
{
    int n;
    for (n=1; n<=16; n++)
        printf("%d, ", fibonacci(n));
    printf("...\n");
    return 0;
}