Question

I’m a new C programmer and I wanted to know how I can pass a struct through to a function. I’m getting an error and can’t figure out the correct syntax to do it. Here is the code for it….

Struct:

struct student{
    char firstname[30];
    char surname[30];
};

struct student person;

Call:

addStudent(person);

Prototype:

void addStudent(struct student);

and the actual function:

void addStudent(person)
{
    return;
}

Compiler errors:

line 21: warning: dubious tag declaration: struct student
line 223: argument #1 is incompatible with prototype:

Answer 1

The line function implementation should be:

void addStudent(struct student person) {

}

person is not a type but a variable, you cannot use it as the type of a function parameter.

Also, make sure your struct is defined before the prototype of the function addStudent as the prototype uses it.