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  1. //配列基礎(確認)
  2.  
  3. #include <stdio.h>
  4.  
  5. int main(void) {
  6.     // 宣言と同時に初期化する方法
  7.     int int_arr1[5] = {0, 1, 2, 3, 4};
  8.  
  9.     // 全ての要素をゼロで初期化する方法
  10.     int int_arr2[5] = {};
  11.     for(int i = 0; i < 5; i++) {
  12.         if(i < 4) {
  13.             printf("%d,", int_arr2[i]);
  14.         } else {
  15.             printf("%d\n", int_arr2[i]);
  16.         }
  17.     }
  18.  
  19.     // 途中まで初期化
  20.     int int_arr3[5] = {0, 1, 2};
  21.     for(int i = 0; i < 5; i++) {
  22.         if(i < 4) {
  23.             printf("%d,", int_arr3[i]);
  24.         } else {
  25.             printf("%d\n", int_arr3[i]);
  26.         }
  27.     }
  28.  
  29.     // ひとつの要素だけゼロ以外を指定
  30.     int int_arr4[5] = {[2] = 2};
  31.     for(int i = 0; i < 5; i++) {
  32.         if(i < 4) {
  33.             printf("%d,", int_arr4[i]);
  34.         } else {
  35.             printf("%d\n", int_arr4[i]);
  36.         }
  37.     }
  38.  
  39.     // 要素数の記述を省略
  40.     char char_arr1[] = {'H', 'e', 'l', 'l', 'o'};
  41.     printf("%s\n", char_arr1);
  42.  
  43.     // 文字列で初期化
  44.     char char_arr2[16] = "Hello";
  45.  
  46.     return 0;
  47. }
Success #stdin #stdout 0s 5472KB
comments (?)
stdin
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Standard input is empty
stdout
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0,0,0,0,0
0,1,2,0,0
0,0,2,0,0
Hello
https://ideone.com/lSNlmo
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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