// (4)define a type named cmpFcn, this type is a pointer to function. typedef bool (*cmpFcn) (const string&, const string&); typedef int func(int*, int); // func is a function type, not a pointer to a function. // (5)function pointer as a parameter void useBigger(const stri...
//the result is 3; also , we can use typedef to define a function pointer type to simplify the programming. eg. #typedef int (*MyFunPointer)(int a,int b); //we define a function pointer type which has int return type and has two int parameters. void main() { MyFunPointer p; p=...
The void pointer, also known as the genericpointer, is a special type of pointer that can be pointed at objects of any data type! A void pointer is declared like a normal pointer, using the void keyword as the pointer’s type: #include<stdio.h> #define TRUE 1 #define FALSE 0 int I...
利用typedef定義一個predicate型態的function pointer,傳入為int,傳出為int,雖然不一定得自行用typedef定義,但function pointer很容易寫成很複雜很難懂的程式,所以建議用typedef重新定義。 21行 void print_array(int *beg, int *end, predicate fn) { 宣告print_array最後一個參數為predicate這個function pointer型態,可...
return_type (*function_pointer)(parameter_type_1 param1, parameter_type_2 param2, ...); 比如我们有一个函数 void f() {} 我们可以定一个可以存储它地址的函数指针 void (*funcPtr)() = f; 或者 void (*funcPtr)() = &f; 也就是对于函数指针,赋值的时候对应的函数名前面是否使用取地址...
int (*function) (int param);//现在就是指向函数的指针了 若要定义相应类型,即为类型来起名字,就是下面的形式: typedef int integer_t; //整型类型 typedef int *pointer_t; //整型指针类型 typedef int array_t [5]; //整型数组类型 ...
//Declare a function pointer for the application typedef (void)(*pfJumpToApplication)(void); //Assumed,starting address of the application #define APPLICATION_STARTING_ADDRESS (uint32_t)0x08020000 static void JumpToStm32Application(void) { //Create function pointer for the user application pfJump...
Also, note that Swift requires me to define the function outside the class, or withing the same function declaration that I am passing the the callback as a parameter to function (here that would mean declaring the callback inside the prepareOpenGL() function declaration). ...
#define E 2.71828 double Integral(double(*p)(double),double a,double b); double fun1(double x); double fun2(double x); double fun3(double x); double fun4(double x); void Myfunction(); int main() { Myfunction(); return 0; ...
7、一个指向函数的指针,该函数有一个整型参数并返回一个整型数(A pointer to a function that takes an integer as an argument and returns an integer) 8、一个有10个指针的数组,该指针指向一个函数,该函数有一个整型参数并返回一个整型数 ( An array of ten pointers to functions that take an integer...