CloverETL Designer4.9 Quick Start

C programming

C Program Compilation A simple C program For this lecture, we will learn how to write, compile, and run a very basic C program, and we will discuss the steps that are involved in creating the executable. The following C program prints out the text “Hello world!” to the screen: /* * File: hello.c * ------------- * This simple C program prints out the text "Hello world!". */ #include<stdio.h> int main(void) { printf("Hello world!\n"); } To compile this program, we will be using the gcc compiler in Linux, which stands for “Gnu Compiler Collection”, and it is used as follows: $ gcc hello.c This creates an executable called a.out. To run the executable, you would type $ ./a.out Hello world! If we wanted to create an executable that is named something other than a.out, we would use the -o option in the form $ gcc -o hello hello.c and we could run the hello executable with $ ./hello Hello world! In what fol...

Your First Go Code

How to Write Go Code Introduction Code organization GOPATH and workspaces Import paths Package names Building and installing Building a package Building a command Testing Remote packages Further reading Introduction This document demonstrates the development of a simple Go package and introduces the go command , the standard way to fetch, build, and install Go packages and commands. Code organization GOPATH and workspaces One of Go's design goals is to make writing software easier. To that end, the go command doesn't use Makefiles or other configuration files to guide program construction. Instead, it uses the source code to find dependencies and determine build conditions. This means your source code and build scripts are always in sync; they are one and the same. The one thing you must do is set a GOPATH environment variable. GOPATH tells the go command (and other related tools) where to find...

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