"The" Book of C

PATH Environment Variable

What is environment variable? As the name suggests, environment variables are are part of the environment in which a process executes. e.g. if we run a command ‘ls‘ on command prompt on a Linux terminal, the Terminal is the environment in which the ls is executed, and environment variables are part of the terminal. PATH…

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Checking Return Value of a Program

We learned how to launch a program from command line [Refer: https://www.thebookofc.com/environment/launching-from-command-line/]. But how do we check the return value of a program executed on command line? How to check return value on Linux? To know the return value of a program executed from the command line, all we need to do is type the…

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Launching From Command Line

We know that in a C-program the function main can take two arguments, signature being, int main(int argc, char** argv) How do we pass these arguments to main? One way is to launch the program via command line. Let us understand it step by step with an example. We take the sample example from our…

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Set Up

Setup Eclipse on Mac Follow the steps at link below to setup Eclipse CDT on Mac Install Eclipse IDE for C/C++ Developers on Mac OSX Setup Eclipse on Windows Follow the steps at link below to setup Eclipse CDT on Windows platform: https://www3.ntu.edu.sg/home/ehchua/programming/howto/EclipseCpp_HowTo.html Setup Eclipse on Linux Run the following command on command prompt to…

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