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bool people[30][6]; for(int i = 0; i < 30; i++) for(int j = 0; j < 6; j++) people[i][j] = true;
people[29][0]、の値は何people[29][1]ですか? かtrue、falseそれともNULL?
people[29][0]
people[29][1]
true
false
NULL
people[30][1],people[30][2]未定義の値です - 30 は配列の宣言された範囲を超えています (29 は最大です)。
people[30][1],people[30][2]