一位數(shù)組獲取大小

size_t elementSize = sizeof(array[0]);     //獲取數(shù)組的總字節(jié)大小
size_t numberOfElements = sizeof(array) / sizeof(array[0]);   //獲取元素的個(gè)數(shù)

二維數(shù)組獲取行大小, 列大小, 總大小

    int array[3][4] = { {1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12} };
    size_t rowSize = sizeof(array) / sizeof(array[0]);
    size_t columnSize = sizeof(array[0]) / sizeof(array[0][0]);
    size_t totalBytes = sizeof(array);