How to compile, run C, C + + programs under Linux?

The most important software development tool in Linux is GCC. GCC is the GNU C and C + + compiler. In fact, GCC can compile three kinds of C, C + +, and object C (an object-oriented extension of the C language). Use the GCC command to compile and connect both C and C + + source programs at the same time.

#DEMO #: HELLO.C

If you have two or a few C sources, you can also easily compile, connect, and build executables using GCC. For example, suppose you have two source files Main.c and factorial.c two source files, now you want to compile a program that generates a factorial calculation.

-----------------------
List FACTORIAL.C
-----------------------
#include <stdio.h>
#include <stdlib.h>

int factorial (int n)
{
if (n <= 1)
return 1;

Else
return factorial (n-1) * n;
}
-----------------------

-----------------------
List MAIN.C
-----------------------
#include <stdio.h>
#include <stdlib.h>

int factorial (int n);

int main (int argc, char **argv)
{
int n;

if (ARGC < 2) {
printf ("Usage:%s n\n", argv [0]);
return-1;
}
else {
                           n & nbsp  =    atoi     (argv[1]);