为您找到"
int a[]={1,2,3,4,5};int *p;p=&a,这样的操作不行?
"相关结果约100,000,000个
int *p=(int*)(&a+1); is undefined behavior. This is because (&a + 1) effectively shifts the pointer from the address of a by sizeof(a) (that's what the +1 does). Now the pointer is pointing to the beginning of another array of the same size as a, but not a, and not a memory location that we are actually sure is the memory of a new array.
Note: Pointers can be outputted using %p, since, most of the computers store the address value in hexadecimal form using %p gives the value in that form. But for simplicity and understanding we can also use %u to get the value in Unsigned int form. 2. Addition of Integer to Pointer. When a pointer is added with an integer value, the value is first multiplied by the size of the data type and ...
int i; // An integer variable int a[10]; // An integer array int *p; // A reference variable to an int variable // p can contain an address of an int variable
public void start() {int nums = {1,2,3,4,5}; int value = 6;
changeIt(nums, value);
for (int k = 0; k < nums.length; k++) ... "nums" still points to {1,2,3,4,5}, and nothing has changed.
A good tip off that nothing will be affected is that if CollegeBoard is calling a method "changeIt", chances are it ISN'T ...
Array in C is one of the most used data structures in C programming. It is a simple and fast way of storing multiple values under a single name. In this article, we will study the different aspects of array in C language such as array declaration, definition, initialization, types of arrays, array syntax, advantages and disadvantages, and many more.
Which of the following code segments would correctly set the first two elements of array arr to 10 so that the new value of array arr will be {10, 10, 3, 4, 5} ? A arr[0] = 10;
EXPLANATION: int a[] = {1,2,3,4,5}; this statement creates a array with name "a" and contains 1,2,3,4,5. the index is a integer used to denote positions of the elements in a array. Normally, the index starts with zero …View the full answer
More on pointers and arrays • Suppose that a is an int array of size 10. • If pa is a pointer to an integer, i.e., int *pa; then the assignment
Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.
@AnT I am expecting the output as "2 3 3 4" because I think initially the ptr is pointing to the first row of double dimensional array "a". Therefore (*ptr)[1] of first printf will give us 2, like wise (*ptr)[2] will give us 3.But after the ++ptr line it will start pointing to the second element of the first row of a[][3].Therefore (*ptr)[1] of second line should now give us 3 and likewise ...