쉽게 풀어쓴 C언어 express 12장 연습문제

1(1).

#include <stdio.h>

int equal(struct point p1, struct point p2);

struct point {

int x, y;

};

 

int main(){

struct point p1;

struct point p2;

printf("첫번째x와y의값을입력하시오:");

scanf("%d %d", &p1.x, &p1.y);

printf("두번째x와y의값을입력하시오:");

scanf("%d %d", &p2.x, &p2.y);

printf("일치여부(1이면일치, 0이면불일치):%d\n", equal(p1, p2));

}

int equal(struct point p1, struct point p2) {

if (p1.x == p2.x&&p1.y == p2.y)

return 1;

else

return 0;

}

 

 

 

 

1(2).

#include <stdio.h>

int quadrant(struct point p);

struct point {

int x, y;

};

 

int main(){

struct point p;

printf("첫번째x와y의값을입력하시오:");

scanf("%d %d", &p.x, &p.y);

quadrant(p);

}

int quadrant(struct point p) {

if (p.x > 0 && p.y>0)

printf("1사분면\n");

else if (p.x < 0 && p.y>0)

printf("2사분면\n");

else if (p.x < 0 && p.y<0)

printf("3사분면\n");

else if (p.x > 0 && p.y < 0)

printf("4사분면\n");

else

printf("어떠한위치에도없습니다.\n");

}

 

 

 

 

 

2(1).

#include <stdio.h>

int equal(struct point *p1, struct point *p2);

struct point {

int x, y;

};

 

int main() {

struct point *p1;

struct point *p2;

printf("첫번째x와y의값을입력하시오:");

scanf("%d %d", p1->x, p1->y);

printf("두번째x와y의값을입력하시오:");

scanf("%d %d", p2->x, p2->y);

printf("일치여부(1이면일치, 0이면불일치):%d\n", equal(p1, p2));

}

int equal(struct point *p1, struct point *p2) {

if (p1->x == p2->x&&p1->y == p2->y)

return 1;

else

return 0;

}

 

 

 

 

 

2(2).

#include <stdio.h>

int quadrant(struct point *p);

struct point {

int x, y;

};

int main(){

struct point *p;

printf("첫번째x와y의값을입력하시오:");

scanf("%d %d", &p->x, &p->y);

 

quadrant(p);<- 이부분이 이상함

}

int quadrant(struct point * p) {

if (p->x > 0 && p->y>0)

printf("1사분면\n");

else if (p->x < 0 && p->y>0)

printf("2사분면\n");

else if (p->x < 0 && p->y<0)

printf("3사분면\n");

else if (p->x > 0 && p->y < 0)

printf("4사분면\n");

else

printf("어떠한위치에도없습니다.\n");

return 0;

}

 

 

 

 

 

3.

#include <stdio.h>

int area(struct rectangle r);

int perimeter(struct rectangle r);

int is_square(struct rectangle r);

struct point {

int x, y;

};

struct rectangle {

struct point a, b;

};

 

int main()

{

struct rectangle r;

struct point a, b;

printf("첫번째점의좌표를입력하시오:");

scanf("%d %d", &r.a.x, &r.a.y);

printf("두번째점의좌표를입력하시오:");

scanf("%d %d", &r.b.x, &r.b.y);

if (r.a.x < 0)

r.a.x = -r.a.x;

if (r.a.y < 0)

r.a.y = -r.a.y;

if (r.b.x < 0)

r.b.x = -r.b.x;

if (r.b.y < 0)

r.b.y = -r.b.y;

area(r);

perimeter(r);

is_square(r);

}

int area(struct rectangle r) {

int area;

area = (r.a.x + r.b.x)*(r.a.y + r.b.y);

printf("사각형의넓이:%d\n",area);

}

int perimeter(struct rectangle r) {

int perimeter;

perimeter = ((r.a.x + r.b.x)+(r.a.y + r.b.y))*2;

printf("사각형의둘레:%d\n",perimeter);

}

int is_square(struct rectangle r) {

if ((r.a.x + r.b.x) == (r.a.y + r.b.y))

printf("정사각형입니다.\n");

else

printf("정사각형이아닙니다.\n");

}

 

 

 

 

 

4.

#include <stdio.h>

 

struct complex

{

double real;

double imag;

};

struct complex complex_add(struct complex c1, struct complex c2);

int main()

 

{

struct complex c1, c2;

printf("첫번째복소수의실수부분과허수부분을입력하세요\n");

scanf_s("%lf %lf", &c1.real, &c1.imag);

printf("두번째복소수의실수부분과허수부분을입력하세요\n");

scanf_s("%lf %lf", &c2.real, &c2.imag);

complex_add(c1, c2);

 

}

 

struct complex complex_add(struct complex c1, struct complex c2)

{

struct complex sum;

sum.real = c1.real + c2.real;

sum.imag = c1.imag + c2.imag;

printf("두복소수의합은%.2f+%.2fi입니다.\n", sum.real, sum.imag);

}

 

 

 

 

5.

#include <stdio.h>

struct vector add(struct vector v1, struct vector v2);

struct vector {

double x, y;

};

 

int main() {

struct vector v1;

struct vector v2;

printf("첫번째x,y을입력하세요\n");

scanf_s("%lf %lf", &v1.x, &v1.y);

printf("두번째x,y을입력하세요\n");

scanf_s("%lf %lf", &v2.x, &v2.y);

add(v1, v2);

}

struct vector add(struct vector v1, struct vector v2) {

printf("결과값:%f,%f", v1.x + v2.x, v1.y + v2.y);

}

 

 

 

 

 

6.

#include <stdio.h>

 

struct member {

char i[20];//제목

char a[30];//수신자

char s[30];//발신자

char c[100];//내용

char d[20];//날짜

int r;//우선순위

};

 

int main() {

struct member s = { "c언어","qordltkr100@naver.com","ajtwoddl247@naver.com","c언어레포트입니다.","2015.12.07",1 };

printf("제목:\t%s\n", s.i);

printf("수신자:\t%s\n", s.a);

printf("발신자:\t%s\n", s.s);

printf("내용:\t%s\n", s.c);

printf("날짜:\t%s\n", s.d);

printf("우선순위:%d\n", s.r);

}

 

 

 

 

 

7.

#include <stdio.h>

 

struct food {

char name[100];

int calories;

};

 

int main() {

struct food food_arr[3];

int i;

for (i = 0; i < 3; i++)

{

printf("음식의이름을입력하시오:");

scanf("%s", &food_arr[i].name);

printf("칼로리를입력하시오:");

scanf("%d", &food_arr[i].calories);

}

for (i = 0; i < 3; i++)

printf("음식이름:%s\n 칼로리:%d kcal\n", food_arr[i].name, food_arr[i].calories);

}

 

 

 

 

 

8.

#include <stdio.h>

 

typedef struct employee {

int num;

char name[20];

char pn[20];//전화번호

int age;

}E

 

int main() {

E e[10];

int i;

for (i = 0; i < 10; i++)

{

printf("사번을입력하시오:");

scanf("%d", &e[i].num);

printf("이름을입력하시오:");

scanf("%s", &e[i].name);

printf("전화번호를입력하시오:");

scanf("%s", &e[i].pn);

printf("나이을입력하시오:");

scanf("%d", &e[i].age);

}

for (i = 0; i < 10; i++)

{

if(e[i].age>=20&&e[i].age<=30)

{

printf("사번:%d\n", e[i].num);

printf("이름:%s\n", e[i].name);

printf("전화번호:%s\n", e[i].pn);

printf("나이:%d\n", e[i].age);

}

}

}

 

 

 

 

 

9.

#include <stdio.h>

 

typedef struct num {

char name[20];

char num[20];//전화번호

char pnum[20];//휴대전화번호

}E

 

int main() {

E e[10];

char name[10];

int i;

for (i = 0; i < 5; i++)

{

printf("이름을입력하시오:");

scanf("%s", &e[i].name);

printf("집전화번호를입력하시오:");

scanf("%s", &e[i].num);

printf("휴대전화번호를입력하시오:");

scanf("%s", &e[i].pnum);

}

printf("찾고자하는이름을입력하시오:");

scanf("%s", &name);

for (i = 0; i < 10; i++)

{

if (strcmp(name, e[i].name) == 0) {

printf("이름:%s\n",e[i].name);

printf("집전화번호:%s\n", e[i].num);

printf("휴대전화번호:%s\n", e[i].pnum);

}

}

}

 

 

 

 

10.

#include <stdio.h>

 

typedef struct card {

int value;

char suit;

}CARD

int main() {

int i;

CARD a[13];

for (i = 0; i < 13; i++)//스페이드카드

{

a[i].value = i + 1;

a[i].suit = 's'

}

for (i = 0; i < 13; i++)//클로버카드

{

a[i].value = i + 1;

a[i].suit = 'c'

}

for (i = 0; i < 13; i++)//하트카드

{

a[i].value = i + 1;

a[i].suit = 'h'

}

for (i = 0; i < 13; i++)//다이아카드

{

a[i].value = i + 1;

a[i].suit = 'd'

}

}

 

 

 

 

12.

#include <stdio.h>

 

typedef struct music {

char title[100];

char artist[100];

char locate[100];

char genre[100];

}MUSIC

int main() {

int i = 0, j, search;

MUSIC a[10];

char x[100];

printf("==========\n");

printf("1.추가\n");

printf("2.출력\n");

printf("3.검색\n");

printf("4.종료\n");

printf("==========\n");

while (1) {

printf("메뉴를선택하시오:");

scanf("%d", &search);

switch (search) {

case 1: {

if (i > 9) {

printf("저장공간이부족합니다.");

break

}

printf("제목:");

scanf("%s", &a[i].title);

printf("가수:");

scanf(" %s", &a[i].artist);

printf("저장된위치:");

scanf(" %s", &a[i].locate);

printf("분류(가요, 팝, 클래식, 영화음악):");

scanf(" %s", &a[i].genre);

i++;

}break

case 2: {

printf("현재음악파일\n");

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

{

printf("제목:%s", a[i].title);

printf("가수:%s", a[i].artist);

printf("저장된위치:%s", a[i].locate);

printf("분류(가요, 팝, 클래식, 영화음악):%s", a[i].genre);

}

}break

case 3:

printf("검색할제목을입력하시오:");

scanf("%s", &x);

for (j = 0; j < 10; j++)

{

if (strcmp(x, a[j].title) == 0) {

printf("제목:%s", a[j].title);

printf("가수:%s", a[j].artist);

printf("저장된위치:%s", a[j].locate);

printf("분류(가요, 팝, 클래식, 영화음악):%s", a[j].genre);

break

}

}break

case 4:

return -1;

}

}

}

 

 

2016/09/25 - [소스코드] - 쉽게 풀어쓴 C언어 express 11장 연습문제

2016/09/25 - [소스코드] - 쉽게 풀어쓴 C언어 express 10장 연습문제

2016/09/25 - [소스코드] - 쉽게 풀어쓴 C언어 express 9장 연습문제