char str1[] = {'a', 'b', 'c', 'd', 'e'};char str2[] = "abcde";char *ptr = "abcde";char book[][80]={"计算机应用基础","C语言","C++程序设计","数据结构"};提示：sizeof函数可以求数组元素的个数sizeof(str1)=?sizeof(str2)=?sizeof(ptr)=?sizeof(book)=?sizeof(book[0])=?