Question

If I have a program that is using scanf to get user inputted data:

    scanf("%d",&val);

When I run it through lint I get warnings saying that scanf returns a int and it is not being assigned anywhere. What is the c practice to solve this problem? Do I type cast it as void?

    (void)scanf("%d",&val);

Answer 1

The C best practice to solve this warnings is simple: Check the resultcode. The scanf function returns in the int if the operation has gone ok or not, and stores the error usually in errno.

The lack of resultcode checks usually results in big errors in certain situations.