C Struct pointer as Parameter

Question

I'm trying to pass a pointer to a struct in C but i cannot:

float calcular_media(struct aluno *aluno) {

Output warning:

C:\WINDOWS\system32\cmd.exe /c gcc main.c aluno.c
aluno.c:7:29: warning: 'struct aluno' declared inside parameter list

What am I doing wrong? Thank you.

Answer 1

In the file containing the line

float calcular_media(struct aluno *aluno) {

one of the following must be there before the line

• struct declaration: e.g. struct aluno; or
• struct definition: e.g. struct aluno { char c; int i; double d; }; or

• include of some header file which has one of the above: e.g. #include "aluno.h"