Step by Step solution about How to resolve the algorithm Execute a system command step by step in the C programming language

Code Breakdown:

1. Header File Inclusion:

#include <stdlib.h>

This line includes the standard library header file stdlib.h, which provides the system() function used in the code.

2. Main Function:

int main()

This is the entry point of the program. It defines the main() function, which returns an integer (typically 0 to indicate successful execution).

3. Calling the system() Function:

system("ls");

This line invokes the system() function, which executes a shell command. In this case, it executes the ls command, which lists the files and directories in the current directory.

4. Return Statement:

return 0;

After executing the system() call, the main() function returns 0 to indicate successful completion of the program. This is the standard practice for a C program.

Explanation:

The provided C code performs a simple task: it executes the ls command from the shell. When the program is executed, it will open a shell and run the ls command, displaying the list of files and directories in the current directory.

Example Usage:

You can compile and run this program on a Unix-like system (Linux, macOS, etc.) using the following steps:

1. Create a file named test.c with the code above.
2. Compile the program using: gcc test.c -o test
3. Run the program: ./test

Output:

The program will print the contents of the current directory. For example, if the current directory contains the files file1, file2, and file3, the output would be:

file1
file2
file3

#include <stdlib.h>

int main()
{
    system("ls");
    return 0;
}