코드업 기초6. 함수
업데이트:
[1526] 함수로 hello 문자열 출력하기
[입력]
[출력] hello
public class Main {
public static void main(String[] args) {
f();
}
public static void f() {
System.out.println("hello");
}
}
[1527] 함수로 123 값 출력하기
[입력]
[출력] 123
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
f();
}
public static void f() {
System.out.println("123");
}
}
[1528] 함수로 *문자 출력하기
[입력]
[출력] *
public class Main {
public static void main(String[] args) {
f();
}
public static void f() {
System.out.println("*");
}
}
[1529] 함수로 **문자 출력하기
[입력]
[출력] **
public class Main {
public static void main(String[] args) {
f();
}
public static void f() {
System.out.println("**");
}
}
[1531] 함수로 정수(int) 1 리턴하기
[입력]
[출력] 1
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
System.out.println(f());
}
public static int f() {
return 1;
}
}
[1532] 함수로 정수(long long int) -2147483649 리턴하기
[입력]
[출력] -2147483649
public class Main {
public static void main(String[] args) {
System.out.println(f());
}
public static long f() {
return -2147483649L;
}
}
[1533] 함수로 실수(float) 3.14 리턴하기
[입력]
[출력] -2147483649
public class Main {
public static void main(String[] args) {
System.out.printf("%f", f());
}
public static float f() {
return 3.140000f;
}
}
[1534] 함수로 실수(double) 3.1415926535897 리턴하기
[입력]
[출력] 3.1415926535897
public class Main {
public static void main(String[] args) {
System.out.printf("%.13f", f());
}
public static double f() {
return 3.1415926535897;
}
}
[1535] 함수로 가장 큰 값 위치 리턴하기
[입력]
5
1 3 2 1 3
[출력] 2
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
int[] arr = new int[num];
for(int i = 0; i < arr.length; i++) {
arr[i] = sc.nextInt();
}
System.out.println(f(arr));
}
public static int f(int[] arr) {
int max = 0;
max = arr[0];
for(int i = 1; i < arr.length; i++) {
if(max < arr[i]) {
max = arr[i];
}
}
for(int i = 0; i < arr.length; i++) {
if(max == arr[i]) {
return i+1;
}
}
return 0;
}
}
[1536] 함수로 가장 작은 값 리턴하기
[입력]
5
1 3 2 1 3
[출력] 1
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
int[] arr = new int[num];
for(int i = 0; i < arr.length; i++) {
arr[i] = sc.nextInt();
}
System.out.println(f(arr));
}
public static int f(int[] arr) {
int min = 0;
min = arr[0];
for(int i = 1; i < arr.length; i++) {
if(min > arr[i]) {
min = arr[i];
}
}
return min;
}
}
[1537] 함수로 hello 또는 world 출력하기
[입력] 2
[출력] world
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
if(num == 1) str = "hello";
else str = "world";
return str;
}
}
[1538] 함수로 odd 또는 even 출력하기
[입력] 2
[출력] even
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
if(num % 2 == 0) str = "even";
else str = "odd";
return str;
}
}
[1539] 함수로 false 또는 true 출력하기
[입력] -1
[출력] true
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
if(num == 0) str = "false";
else str = "true";
return str;
}
}
[1540] 함수로 zero 또는 non zero 출력하기
[입력] -1
[출력] non zero
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
if(num == 0) str = "zero";
else str = "non zero";
return str;
}
}
[1541] 함수로 negative/zero/positive 출력하기
[입력] 2
[출력] positive
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
if(num == 0) str = "zero";
else if(num > 0) str = "positive";
else str = "negative";
return str;
}
}
[1542] 함수로 prime 또는 composite 출력하기
[입력] 997
[출력] prime
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
System.out.println(f(num));
}
public static String f(int num) {
String str = null;
int cnt = 0;
for(int i = 1; i <= num; i++) {
if(num % i == 0) cnt++;
}
if(cnt == 2) str = "prime";
else str = "composite";
return str;
}
}
[1543] 함수로 love 출력하기
[입력] 3
[출력]
love
love
love
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
for (int i = 0; i < num; i++) {
System.out.println(f());
}
}
public static String f() {
return "love";
}
}
[1544] 함수로 * n개 출력하기
[입력] 5
[출력] *****
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
for (int i = 0; i < num; i++) {
System.out.print(f());
}
}
public static String f() {
return "*";
}
}
[1545] 함수로 true(1) / false(0) 리턴하기
[입력] -1
[출력] non zero
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
if(f(num) == true) System.out.println("non zero");
else System.out.println("zero");
}
public static boolean f(int num) {
boolean yn = false;
if(num != 0) yn = true ;
return yn;
}
}
[1546] 함수로 plus/minus/0 판별하기
[입력] -1
[출력] minus
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
if(zero(num)) System.out.println("zero");
else System.out.println(plus(num) ? "plus" : "minus");
}
public static boolean zero(int num) {
boolean yn = false;
if(num == 0) yn = true;
return yn;
}
public static boolean plus(int num) {
boolean yn = false;
if(num > 0) yn = true;
return yn;
}
}
[1547] 함수로 prime/composite 판별하기
[입력] -1
[출력] minus
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
System.out.println(num(n));
}
public static String num(int n) {
String str = null;
int cnt = 0;
for(int i = 1; i <= n; i++) {
if(n % i == 0) cnt++;
}
if(cnt==2) str = "prime";
else str = "composite";
return str;
}
}
[1548] 함수로 학점 리턴하기
[입력] 89
[출력] B
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int score = sc.nextInt();
System.out.println(grade(score));
}
public static char grade(int score) {
char judgment = ' ';
switch(score/10) {
case 10 :
case 9 : judgment = 'A'; break;
case 8 : judgment = 'B'; break;
case 7 : judgment = 'C'; break;
case 6 : judgment = 'D'; break;
default : judgment = 'F'; break;
}
return judgment;
}
}
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