The system() Function

• The system() function represents a command in the standard C library that takes as its argument a constant character array. In essence, the argument represents a C-style string, which in turn represents a command to send to the operating system. So a programmer would use the function call execute a directory listing on a Windows/DOS computer, like the following example:
  
  #include <stdlib.h>
  
  int main(){
  
  int i = system("dir"); // "i" receives the return result of the command.