pointers

问题 Every time I try to compile my code I get error: cannot convert parameter 1 from 'int *' to 'int *&' The test code looks like this: void set (int *&val){ *val = 10; } int main(){ int myVal; int *pMyVal = new int; set(&myVal); // <- this causes trouble set(pMyVal); // <- however, this doesn't } I'd like to call that function in a single shot without creating a pointer somewhere only to pass it. And as pointers don't have constructors, something like this can't be done: set(int*(&myVal)); Is

问题 Every time I try to compile my code I get error: cannot convert parameter 1 from 'int *' to 'int *&' The test code looks like this: void set (int *&val){ *val = 10; } int main(){ int myVal; int *pMyVal = new int; set(&myVal); // <- this causes trouble set(pMyVal); // <- however, this doesn't } I'd like to call that function in a single shot without creating a pointer somewhere only to pass it. And as pointers don't have constructors, something like this can't be done: set(int*(&myVal)); Is

问题 Every time I try to compile my code I get error: cannot convert parameter 1 from 'int *' to 'int *&' The test code looks like this: void set (int *&val){ *val = 10; } int main(){ int myVal; int *pMyVal = new int; set(&myVal); // <- this causes trouble set(pMyVal); // <- however, this doesn't } I'd like to call that function in a single shot without creating a pointer somewhere only to pass it. And as pointers don't have constructors, something like this can't be done: set(int*(&myVal)); Is

问题 Every time I try to compile my code I get error: cannot convert parameter 1 from 'int *' to 'int *&' The test code looks like this: void set (int *&val){ *val = 10; } int main(){ int myVal; int *pMyVal = new int; set(&myVal); // <- this causes trouble set(pMyVal); // <- however, this doesn't } I'd like to call that function in a single shot without creating a pointer somewhere only to pass it. And as pointers don't have constructors, something like this can't be done: set(int*(&myVal)); Is

问题 I'm designing a preloader-based lock tracing utility that attaches to Pthreads, and I've run into a weird issue. The program works by providing wrappers that replace relevant Pthreads functions at runtime; these do some logging, and then pass the args to the real Pthreads function to do the work. They do not modify the arguments passed to them, obviously. However, when testing, I discovered that the condition variable pointer passed to my pthread_cond_wait() wrapper does not match the one

问题 I'm designing a preloader-based lock tracing utility that attaches to Pthreads, and I've run into a weird issue. The program works by providing wrappers that replace relevant Pthreads functions at runtime; these do some logging, and then pass the args to the real Pthreads function to do the work. They do not modify the arguments passed to them, obviously. However, when testing, I discovered that the condition variable pointer passed to my pthread_cond_wait() wrapper does not match the one

问题 I'm designing a preloader-based lock tracing utility that attaches to Pthreads, and I've run into a weird issue. The program works by providing wrappers that replace relevant Pthreads functions at runtime; these do some logging, and then pass the args to the real Pthreads function to do the work. They do not modify the arguments passed to them, obviously. However, when testing, I discovered that the condition variable pointer passed to my pthread_cond_wait() wrapper does not match the one

问题 This question already has answers here : How does dereferencing of a function pointer happen? (5 answers) Closed last month . According to the GNU C manual, functions can be called using function pointers like so: func (j); /* (*func) (j); would be equivalent. */ So my reasoning here is: func itself is a pointer to the func(int) function. When you call func(j) , you are implicitly accessing the value of the pointer func (you are moving to the memory location where func is), in the same way as

问题 I'm having a problem with C#, I'd like to get a pointer of a method in my code, but it seems impossible. I need the pointer of the method because I want to no-op it using WriteProcessMemory. How would I get the pointer? Example code main() { function1(); function2(); } function1() { //get function2 pointer //use WPM to nop it (I know how, this is not the problem) } function2() { Writeline("bla"); //this will never happen because I added a no-op. } 回答1: I know this is very old, but an example

问题 Can I assume that a C/C++ struct pointer will always point to the first member? Example 1: typedef struct { unsigned char array_a[2]; unsigned char array_b[5]; }test; //.. test var; //.. In the above example will &var always point to array_a? Also in the above example is it possible to cast the pointer to an unsigned char pointer and access each byte separately? Example 2: function((unsigned char *)&var,sizeof(test)); //... //... void function(unsigned char *array, int len){ int i; for( i=0;