CODEWITHSUNDEEP
cmacrosstruct
dimitrov.l
dimitrov.l

Reputation: 63

Initializing a struct using a macro

I've been searching and can't find anything. Consider this structure

typedef struct student
{
    char name[40];
    char grade;
}Student;

how do I make a macro for initializing a structure with parameters? Something along the lines of

Student John = STUDENT(John, A);

where STUDENT is a defined macro

Upvotes: 6

Views: 8642

Answers (2)

BLUEPIXY
BLUEPIXY

Reputation: 40145

#include <stdio.h>

typedef struct student
{
    char name[40];
    char grade;
}Student;

#define STUDENT(name, grade) (Student){ #name, *#grade }

int main(){
    Student John = STUDENT(John, A); 

    printf("%s, %c\n", John.name, John.grade);
    return 0;
}

Upvotes: 2

keltar
keltar

Reputation: 18399

#define STUDENT(name, grade) { #name, grade }

Then Student John = STUDENT(John, 'A'); would be expanded into

Student John = { "John", 'A' };

Upvotes: 9

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