I desparately need help!

The following command:
system("wget www.yahoo.com"); opens the page specified and now what I want to do is append a string(which is a variable thats being read from a file)

e.g
let's say the string being read is /birth so I want to append this string onto the domain name" www.yahoo.com "as a result I want to open the page www.yahoo.com/birth using the system command...so how can I do that?

To create dynamic system calls, just build the string first, before you pass it to system(). You can use the sprintf() function to write a string to a char buffer that formats like printf. For example,

/*read in your variable data, pretend you put it in var so var = "/birth" */
char buffer[50];
sprintf(buffer, "www.yahoo.com%s", var);
system(buffer);