float **fpp;:It denotes two levels of pointers (Multiple indirections). It’s a variable that points to another pointer further points to an object specified in a memory location. For example, fpp be a float pointer currently pointing to memory address 2001, the size of the float is 8 b...
C++ Program - Pointer ArithmeticC Program Pointer Arithmetic
In this program, the elements are stored in the integer array data[]. Then, the elements of the array are accessed using the pointer notation. By the way, data[0] is equivalent to *data and &data[0] is equivalent to data data[1] is equivalent to *(data + 1) and &data[1] is ...
The program counter, also known as the instruction pointer or simply PC, is a fundamental component of a computer's central processing unit (CPU). It is a special register that keeps track of the memory address of the next instruction to be executed in a program. ...
Here,argcis an integer type of arguments, which contains the total number of arguments/parameters supplied through the command line andargv[]is an array of character pointer (array of strings), which contains the all parameters. Here is thelist of some of the command line argument based progr...
Program to compare two strings using pointers in C #include <stdio.h>//Macro for maximum number of characters in a string#define MAX 100intmain(){//declare string variablescharstr1[MAX]={0};charstr2[MAX]={0};intloop;//loop counterintflag=1;//declare & initialize pointer variableschar*p...
A"stack pointer(sp)"keeps track of the stack by each push & pop operation onto it, by adjusting the stack pointer to the next or previous address. The stack area traditionally adjoined the heap area and grew in the opposite direction; when the stack pointer met the heap pointer, free me...
Furthermore, once these processes have agreed to communicate, the communication is private and no other processes can take part in it; this kind of communication is called handshaking. More formally the event described above may be given by a transition relation induced by rec→c?vrec′[v/x]...
实际上,vbptr 指的是虚基类表指针(virtual base table pointer),该指针指向了一个虚基类表(virtual table),虚表中记录了虚基类与本类的偏移地址;通过偏移地址,这样就找到了虚基类成员,而虚继承也不用像普通多继承那样维持着公共基类(虚基类)的两份同样的拷贝,节省了存储空间。
(fp1); /* Make the pointer fp1 to point at the last character of the file */ fseek(fp1, -1L, 2); printf("Number of characters to be copied %d\n", ftell(fp1)); while (cnt) { ch = fgetc(fp1); fputc(ch, fp2); fseek(fp1, -2L, 1); // shifts the pointer to the previous...