C 언어 함수에 구조체 변수 전달과 반환

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

struct s_student

{

char name[20];

int age;

long number;

};

void print_student_info(struct s_student student);

void input_student_info(struct s_student *pStudent);

int main(int argc, char const *argv[])

{

/* code */

struct s_student student = {"NAM", 28, 60121315};

printf("Initial Value\n");

print_student_info(student);

input_student_info(&student);

printf("After Calling Function input_student_inf() \n");

print_student_info(student);

return 0;

}

void print_student_info(struct s_student student)

{

printf(

"Name : %s \t Age : %d \t Number : %ld\n",

student.name, student.age, student.number

);

}

void input_student_info(struct s_student * pStudent)

{

if(NULL != pStudent)

{

printf("Student Name ? ");

scanf("%s", pStudent->name);

printf("Student Age ? ");

scanf("%d", &pStudent->age);

printf("Student Number ? ");

scanf("ld", &pStudent->number);

printf("Call by Value\n");

print_student_info(*pStudent);

}

else

{

printf("NULL !!!\n");

}

}

> Executing task: ./input_student_info.exe <

Initial Value
Name : NAM       Age : 28        Number : 60121315
Student Name ? Dong-Gil
Student Age ? 28
Student Number ? Call by Value
Name : Dong-Gil          Age : 28        Number : 60121315
After Calling Function input_student_inf()
Name : Dong-Gil          Age : 28        Number : 60121315

#include <stdio.h>

#include <stdlib.h>

struct s_student

{

char name[20];

int age;

long number;

int score;

};

void print_student_info(struct s_student student);

struct s_student get_max_score_student(struct s_student *pStudent,

int student_count);

int main(int argc, char const *argv[])

{

struct s_student students[] = {

{"NAM", 28, 60121315, 100},

{"HOON", 29, 60121316, 100},

{"MOON", 50, 60121317, 60}

};

struct s_student student = {0};

int count = 0;

count = sizeof(students)/ sizeof(struct s_student);

student = get_max_score_student(students, count);

printf("Highest Scored Student\n");

print_student_info(student);

/* code */

return 0;

}

void print_student_info(struct s_student student)

{

printf("Name : %s \t Age : %d \t Num : %ld \t Score : %d",

student.name, student.age, student.number, student.score);

}

struct s_student get_max_score_student(struct s_student *pStudent,

int student_count)

{

struct s_student student = {0};

int i = 0;

int max_score = pStudent->score;

if(NULL != pStudent){

for(i = 0 ; i < student_count; i++){

if(max_score <= (pStudent + i)->score)

{

student = *(pStudent + i);

}

}

}

else

{

printf("NULL 오류 !!");

}

return student;

}

> Executing task: ./get_max_score_student.exe <

Highest Scored Student
Name : HOON      Age : 29        Num : 60121316          Score : 100