C :: Compute Total Price Of Books By A Given Author

Given a structure book defined as follows and an array lib of books

Code:
struct Book{
char title[100];
char author[100];
int price;
struct Book *nextedition;
};

struct Book lib[1000]; I'm going to write a function to compute total price of books by a given author including all books which are future editions of his book, even if the author of that future edition is NOT the specified author. title author price nextedition Book1 Author1 25 &lib[2] Book2 Author2 20 NULL Book3 Author3 30 &lib[3] Book4 Author1 35 NULL
For the example above, given the author "Author1", the function should return 90 (=25+30+35), and given the author "Author 3", the function should return 65 (=30+35).

So here's my attempt:

Code:
int totalPrice(char author[100]){
int total=0;
for (i=0; i<numbooks; i++)
if(strcmp(author, lib[i].author==0))

[Code] ....

What I'm trying to do is finding the first book in the lib of the specified author using for loop and then let the while loop do the rest. However, it seems the price is over-counted after each iteration of the for loop but I don't know how to fix it.