Learn about C pointer arithmetic, its operations, and how to effectively use pointers in C programming for better code manipulation.
除了使用赋值操作让一个指针引用一个给定的对象或函数,也可以使用算术运算来修改一个对象指针。当进行指针算术运算(pointer arithmetic)时,编译器会自动在运算中采用指针所指类型的空间大小。 对于指向对象的指针,可以进行下列的运算: (1)对一个指针执行整数加法和减法操作。 (2)两个指针相减。 (3)比较两个指针。
Void pointers can point to any memory chunk. Hence the compiler does not know how many bytes to increment/decrement when we attempt pointer arithmetic on a void pointer. Therefore void pointers must be first typecast to a known type before they can be involved in any pointer arithmetic. void ...
除了使用赋值操作让一个指针引用一个给定的对象或函数,也可以使用算术运算来修改一个对象指针。当进行指针算术运算(pointer arithmetic)时,编译器会自动在运算中采用指针所指类型的空间大小。 对于指向对象的指针,可以进行下列的运算: (1)对一个指针执行整数加法和减法操作。 (2)两个指针相减。 (3)比较两个指针。
http://stackoverflow.com/questions/3523145/pointer-arithmetic-for-void-pointer-in-c When a pointer to a particular type (say int, char, float, ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, ...
warning:pointer of type'void *'used in arithmetic[-Wpointerarith] C Copy 这不是标准C允许的行为,所以编译器发出了警告。不过,pv包含的地址增加了4字节。 从指针减去整数 就像整数可以和指针相加一样,也能从指针减去整数。减去整数时,地址值会减去数据类型的长度和整数值的乘积。为了演示从指针减去整数的效果...
1Pointer arithmetic There are four arithmetic operators that can be used in pointers: ++, --, +, - 2Array of pointers You can define arrays to hold a number of pointers. 3Pointer to pointer C allows you to have pointer on a pointer and so on. ...
pointer n.指针 natural language 自然语言 array n.数组矩阵, source text 源文本 subscript n.下标 intermediate language 中间语言 type conversion 类型转换 software development 软件开发 address arithmetic 地址运算 map vt.映射,计划 denote vt.指示,表示 ...
pointer n.指针 natural language 自然语言 array n.数组矩阵, source text 源文本 subscript n.下标 intermediate language 中间语言 type conversion 类型转换 software development 软件开发 address arithmetic 地址运算 map vt.映射,计划 denote vt.指示,表示 ...
Some valid pointer arithmetics are as shown below: Addition of a number to a pointer For example, we can write int *ip; int a[10]; ip = &a[3]; and we would end up with ip pointing at the fourth cell of the array a (remember, arrays are 0-based, so a[0] is the first cel...