Hi, I am new to programming.My requirement is to update the parameter value in my config file using Libconfig C API. This is the .cfg file. example.cfg / An example configuration file that stores information about a store. Code: // Basic store information: name = "Books, Movies & More"; // Store inventory: inventory = { books = ( { title = "Treasure Island"; author = "Robert Louis Stevenson"; price = 29.99; qty = 5; }, { title = "Snow Crash"; author = "Neal Stephenson"; price = 9.99; qty = 8; } ); movies = ( { title = "Brazil"; media = "DVD"; price = 19.99; qty = 11; }, { title = "The City of Lost Children"; media = "DVD"; price = 18.99; qty = 5; }, { title = "Memento"; media = "Blu-Ray"; price = 24.99; qty = 20; }, { title = "Howard the Duck"; } ); }; // Store hours: hours = { mon = { open = 9; close = 18; }; tue = { open = 9; close = 18; }; wed = { open = 9; close = 18; }; thu = { open = 9; close = 18; }; fri = { open = 9; close = 20; }; sat = { open = 9; close = 20; }; sun = { open = 11; close = 16; }; }; the corresponding code is -------------------------------- #include <stdio.h> #include <stdlib.h> #include <libconfig.h> /* This example reads the configuration file 'example.cfg', adds a new * movie record to the movies list, and writes the updated configuration to * 'updated.cfg'. */ int main(int argc, char **argv) { static const char *output_file = "example.cfg"; config_t cfg; config_setting_t *root, *setting, *movie; config_init(&cfg); /* Read the file. If there is an error, report it and exit. */ if(! config_read_file(&cfg, "example.cfg")) { fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg)); config_destroy(&cfg); return(EXIT_FAILURE); } // /*Need the function to update the value of title = "algorithm design"; instead of title = "Treasure Island"; wed = { open = 10; close = 19; }; instead of wed = { open = 9; close = 18; }; */ /* Write out the updated configuration. */ if(! config_write_file(&cfg, output_file)) { fprintf(stderr, "Error while writing file.\n"); config_destroy(&cfg); return(EXIT_FAILURE); } fprintf(stderr, "Updated configuration successfully written to: %s\n", output_file); config_destroy(&cfg); return(EXIT_SUCCESS); } /* eof */