합, 평균, 최댓값, 최솟값

// 작성자 : 김준현

// 작성일 : 2017-04-05

# include <stdio.h>

# include <stdlib.h>

# include <string.h>

# define L 3

# define large_ope(a, b) a>=b?a:b

# define small_ope(a, b) a<=b?a:b

typedef struct NUM

{

signed int num[L];

signed int large; // 최대값

signed int small; // 최소값

signed int sum; // 합계

double ave; // 평균

}NUM, *PTR_NUM;

// 1

PTR_NUM func_start();

// 2

void func_insert(NUM** n);

// 3

void func_sum(NUM** n);

// 4

void func_average(NUM** n);

//5

void func_large(NUM** n);

//6

void func_small(NUM** n);

int main(void)

{

PTR_NUM start = NULL;

start = func_start();

func_insert(&start);

func_sum(&start);

func_average(&start);

func_large(&start);

func_small(&start);

free(start);

return 0;

} // end of main function

// 1

PTR_NUM func_start()

{

PTR_NUM p = (PTR_NUM)malloc(sizeof(NUM));

if (p == NULL)

{

exit(1);

}

else

{

memset(p, 0, sizeof(NUM));

return p;

}

} // end of func_start function

// 2

void func_insert(NUM** n)

{

int i; // index

for (i = 0; i < L; i++)

{

printf("[%d] data : ", i+1);

scanf("%d", &((*n)->num[i]));

}

} // end of func_insert function

// 3

void func_sum(NUM** n)

{

int i; // index

for (i = 0; i < L; i++)

{

(** n).sum += (**n).num[i];

}

printf("Total sum => %d \n", (** n).sum);

} // end of func_sum function

// 4

void func_average(NUM** n)

{

(** n).ave = (** n).sum / L;

printf("ave => %.2lf \n", (** n).ave);

} // end of func_average function

// 5

void func_large(NUM** n)

{

(** n).large = large_ope((** n).num[0], (** n).num[1]);

(** n).large = large_ope((** n).large, (** n).num[2]);

printf("large => %d \n", (** n).large);

} // end of func_large function

// 6

void func_small(NUM** n)

{

(** n).small = small_ope((** n).num[0], (** n).num[1]);

(** n).small = small_ope((** n).small, (** n).num[2]);

printf("small => %d \n", (** n).small);

} // end of func_small function