#include <stdio.h>

int main() {
    int arr1[5]; //선언
    arr1[0] = 30; //초기화
    arr1[4] = 2;
    printf("%d %d\n", arr1[0], arr1[4]);

    int arr2[5] = {20, 40, 60, 90, 10};
    for(int i=0;i<5;i++){
        printf("인덱스 %d: %d\n", i, arr2[i]);
    }

    int arr3[] = {1, 3, 5};
    for(int i=0; i<sizeof(arr3)/sizeof(arr3[0]); i++){
        printf("%d\n", arr3[i]);
    }

    float arr_f[5] = {1.2, 3.4, 5.2, 6.8, 9.0};
    for(int i=0;i<5;i++){
        printf("%.1f\n", arr_f[i]);
    }

    char arr_c[5] = "algo";
    printf("%s\n", arr_c);
    for(int i=0;i<4;i++){
        printf("%c\n", arr_c[i]);    
    }
    
    char c = 'A';
    printf("%d\n", c);
    for(int i=0;i<4;i++){
        printf("%d\n", arr_c[i]);    
    }
    
}