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4hv.org :: Forums :: Computer Science
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What is wrong with this line of code?

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big5824
Sat Dec 11 2010, 10:54PM Print
big5824 Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240
I am currently writing a C program for my uni coursework, and am having a lot of trouble with this code. It is exactly the same as the material we were given, and works in C++, but throws "syntax error before *" when compiled as C.

void set_base_values(student_info *pointer) //error is thrown here
{
(*pointer).maths_1.mark = 0;
(*pointer).maths_2.mark = 0;
}

where the student_info struct is defined at:
struct student_info
{
struct module maths_1; //module is just another struct template
struct module maths_2;
};

and declared at:
struct student_info student;


The idea of the top function is that i can pass it the memory address of a struct of type student_info, which it will then set certain values within.

Help is greatly appreciated, I have to have this cracked by monday cheesey
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Nicko
Sun Dec 12 2010, 12:40AM
Nicko Registered Member #1334 Joined: Tue Feb 19 2008, 04:37PM
Location: Nr. London, UK
Posts: 615
I suspect its because C++ implicitly typedefs defined structs with a name the same as the struct, whereas C, being older, doesn't do that for you automatically.

I can't remember the exact syntax, but in the instantiation of set_base_balues, you'll need to change it to:

void set_base_values(struct student_info *pointer)
{
 /* stuff */
}

Cheers
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big5824
Sun Dec 12 2010, 12:52AM
big5824 Registered Member #1687 Joined: Tue Sept 09 2008, 08:47PM
Location: UK, Darlington
Posts: 240
Perfect :D thank you very much :)
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