#include <iostream>
using namespace std;
struct stStudent {
char pszName[66],
pszAddress[66],
pszCity[26],
pszState[3],
pszPhone[13];
int icourses;
float GPA;
};
void vByValueCall (stStudent stAStudent);
void vByVariableCall (stStudent *pstAStudent);
void vByReferenceCall (stStudent &rstAStudent);
int main(void)
{
stStudent astLargeClass[100];
astLargeClass[0].icourses = 10;
vByValueCall( astLargeClass[0]);
cout << astLargeClass[0].icourses << "\n"; // icourses still 10
vByVariableCall(&astLargeClass[0]);
cout << astLargeClass[0].icourses << "\n"; // icourses = 20
vByReferenceCall( astLargeClass[0]);
cout << astLargeClass[0].icourses << "\n"; // icourses = 30
}
void vByValueCall(stStudent stAStudent)
{
stAStudent.icourses += 10; // normal structure syntax
}
void vByVariableCall(stStudent *pstAStudent)
{
pstAStudent->icourses += 10; // pointer syntax
}
void vByReferenceCall(stStudent &rstAStudent)
{
rstAStudent.icourses += 10; // simplified reference syntax
}
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