I’ve found out that I should use std::less to compare my objects to be able to compare Unrelated pointer (from a different sequences) because just using the relational operator < yields UB if used on those unrelated pointers. So for practice I’ve implemented my compare function: #include <iostream> using namespace std; #include <functional> template <class ..
Category : pointers
I am learning pointers, and when I run this code: #include <iostream> using namespace std; int main(){ int a = 10; int *p; p = &a; cout << "current adress" << p << endl; p = p+1; cout << "Next adress" << p << endl; } I get a pointer that is hard to understand. ..
When I change a pointer in a Union, my other pointers break and show invalid pointer. CustomDataTypeExample Class: struct CustomDataTypeExample { float x; float y; float z; CustomDataTypeExample() = default; CustomDataTypeExample(float x, float y, float z) { this->x = x; this->y = y; this->z = z; }; // … }; ConfigCustomDataTypeExample class: struct ConfigCustomDataTypeExample { ..
I have this following function VOID printip(void *ip, THREADID tid) { PIN_GetLock(&pinLock, tid+1); fprintf(trace, "%d %pn", tid, ip); fflush(trace); PIN_ReleaseLock(&pinLock); } The pointer ip is printed in hexadecimal format, but I want to print it in integer format. So i tried the following–> VOID printip(int *ip, THREADID tid) { PIN_GetLock(&pinLock, tid+1); fprintf(trace, "%d %dn", tid, ..
#include <iostream> using namespace std; struct C { int m; int n;}; int main() { //the following two lines echo 1 cout << &C::m << endl; cout << &C::n << endl; return 0; } I read the first example code from here,still can not understand why.Since we do not have a object,we do not assign ..
I have a char* buffer pointer, pointing to buffer of 1.5e+8 bytes, so iterating through it linearly is a timely task. I want to send chunks of this buffer (200-800 bytes) iteratively. Right now I’m doing^ void do_stuff(char* buff) { size_t size_of_msg = 200; send(buff, size_of_msg); buff+=size_of_msg; } But this takes more time than I ..
vector<int> filterRestaurants(vector<vector<int>>& res, int vFri, int maxPrice, int maxDistance) { vector<vector<int>> pair; vector<int> fin; int j=0; if(vFri==1){ for(int i=0;i<res.size();i++){ if(res[i][3]<=maxPrice && res[i][4]<=maxDistance && res[i][2]==1){ pair[j][0]=res[i][0]; pair[j][1]=res[i][1]; j++; } } } else{ for(int i=0;i<res.size();i++){ if(res[i][3]<=maxPrice && res[i][4]<=maxDistance){ pair[j][0]=res[i][0]; pair[j][1]=res[i][1]; j++; } } } return fin; } the code is showing runtime error of reference poiting to ..
I’m trying to create a char* toTitleCase function(char* text) that makes every word in a text start with a capital letter. Here is my current code: char* toTitleCase(char* text) { char* arr = new char[strlen(text) + 1]; for (int i = 0; *(text + i) != ‘{$content}’; i++) arr[i] = *(text + i); // Example: ..
I’ve been talking about type punning with my roommate and we were disagreeing on whether or not taking an object and assigning it’s reference to a byte pointer to treat it as a byte array in order to pass it to a system call, was the same as type punning or not? I had just ..
In Golang, dereferencing a nil pointer can cause a panic, and the call stack will be printed. When comes to C++, only segmentation fault 11 will be returned. So how could I get the position of the dereferencing. What is the solution in production environment? Source: Windows Que..
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