6-3（4）用指针找统计字符个数，例题，通过指针引用数组元素，指针矩阵转置，指针链表，指针排序，指针数组排序Cpp，指针字符串连接-6-3 (4) with a pointer to the number of characters to find statistics, examples, reference array elements via pointers, pointer matrix transpose, the pointer list, sorting pointers, po