#include <stdio.h>
 
int main(void){    /* ←voidかint argc, char* argv[]と書くのが普通 */
    double x[10];
    int i;
 
    x[0] = 20.1;    /* 変数は初期化時に代入できる。 */
    x[1] = 20.2;    /* 例:                          */
    x[2] = 20.3;    /* int a[5] = {1, 2, 3, 4, 5};  */
    x[3] = 20.4;    /* また、事前に代入する際は     */
    x[4] = 20.5;    /* []内に数字は不要。           */
    x[5] = 20.6;    /* (代入した数で分かるため)     */
    x[6] = 20.7;    /* 例:                          */
    x[7] = 20.8;    /* int b[] = {9, 8, 7, 6};      */
    x[8] = 20.9;
    x[9] = 20.0;
 
    for(i = 0; i < 10; i++){
        printf("%f\n", x[i]);
    }
    return 0;
}
 

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