1.Pass by Address C語言 為了達成pass by address,C利用pointer達到此需求。 1/* 2(C) OOMusou 2007http://oomusou.cnblogs.com 3 4Filename : pointer_swap.cpp 5Compiler : Visual C++ 8.0 / BCB 6.0 / gcc 3.4.2 / ISO C++ 6Description : Demo how to use pointer to implement pass by addre...
以数组指针为例:数组指针示例:写一个指向 int arr[10] 数组的数组指针; 代码语言:javascript 代码运行次数:0 运行 AI代码解释 第一步:(*p)//先确定是一个指针第二步:(*p)[10]//确定指向的是一个有10个元素的数组第三步:int(*p)[10]//确定该数组元素为int型第四步:int(*p)[10]=&arr;//将数组的...
to pointer p. To get the address of a variable we use &p=&c;printf("\n This is the value of char c: %c ", c);//As we said, we use & to get the address. We are printing the memory address in which c is located:printf("\n This is the address...
getchar(); return 0; }是不是觉得原来C语言也可以这么灵活,也可以这么玩啊。四、C语言使用typedef 简化指针定义typedef的作用就是专门给类型名起一个别名的,如下:typedef int HaHa; typedef double Hello;所以我们同样可以给指针类型起一个别名。(1)变量指针int a = 100; typedef int * Pointer; //Pointer就...
("Failed to open the file.\n"); return 1; } // 获取文件指针的位置 long int position = ftell(fp); if (position == -1) { printf("Failed to get the position of the file pointer.\n"); return 1; } printf("The position of the file pointer is %ld.\n", position); fclose(fp)...
个int元素的数组的指针变量int*p_int;//指向int类型变量的指针double*p_double;//指向idouble类型变量的指针struct Student*p_struct;//结构体类型的指针int(*p_func)(int,int);//指向返回类型为int,有2个int形参的函数的指针int(*p_arr)[3];//指向含有3个int元素的数组的指针int**p_pointer;//指向 一个...
[i] = rand(); printf("%d\n", r[i] ); } return r; } /* 要调用上面定义函数的主函数 */ int main () { /* 一个指向整数的指针 */ int *p; int i; p = getRandom(); for ( i = 0; i < 10; i++ ) { printf("*(p + [%d]) : %d\n", i, *(p + i) ); } ...
int function_pointer_test_1(void) { int ret; int arg = 1; FUNCTION func = NULL; //定义个函数指针 func = test_function_1; //把函数指针指向test-function-1 //ret = test_function_1(arg); //通过函数名直接调用test-function-1函数 ...
int** p_pointer; //指向 一个整形变量指针的指针 取地址 既然有了指针变量,那就得让他保存其它变量的地址,使用& 运算符取得一个变量的地址。 int add(int a , int b) { return a + b; } int main(void) { int num = 97; float score = 10.00F; ...
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. ...