180 Topics
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 | Hello programmers! I have been working on STL algorithms for some time now as a beginner, and I started doing an exercise, among which is the task of `use the fill algorithm to fill the entire array of strings named items with "hello"`. My code for this is below: // … |
| | Hello everybody. I'm trying to write program with vectors and iterators. Coordinates X and Y are entered from keyboard (as structure) and placed in vector of points. It's necessary to display coordinates with maximal X and Y. This code was compiled but not display maximal X. What should I change? …  |
 | I have error in my program.I want to display name in order by using radix sort  |
| | I want to order this program by name in descinding order. #include <iostream.h> #include <stdio.h> #include <conio.h> #include <string.h> #define MAX 10 struct std{ char name[20]; int age,year; }; class radixsort{ struct std arr[MAX]; int n,i; public: int a[]; int b[]; void getdata(); void showdata(); void sortLogic(); }; void radixsort … |
| | write a c++ write a c++ programe that accept resalt frome the user and displays grade and remark as follows if resalt >=90 the grade 'A' Remark 'EXCELLENT' if resalt >=80 the grade 'B' Remark 'VERYGOOD' if resalt >=70 the grade 'C' Remark 'GOOD' if resalt >=60 the grade 'D' …  |
| | Hello funs2code! I have the following problem. I need to count the number of occurrences of a concrete word in a text file. I've tried to count the number of occurrences of each word at first. The following code has no errors but it isn't working! When I type in … |
 | #include <memory> #include <deque> void MyFunc { std::deque< std::shared_ptr< Sprite* > > SpriteList; func_to_fill_deque( SpriteList ); for( auto i = SpriteList.begin(), end = SpriteList.end(); i != end; i++ ) { SpriteList[ i ]->spriteFunc(); // doesn't work SpriteList.at( i )->spriteFunc(); // also doesn't work } } void func_to_fill_deque( std::deque< std::shared_ptr< Sprite* … |
| | //please can someone explain the output 4 8 12,why is it so? Thanks int count = 0; do { for( int i = 0; i < 4; i++ ) count++; cout << count << ‘ ‘; } while ( count < 10 ); |
| | Hello guys :) I hope you are well. I have a problem, I am trying to build a 2D platformer and I am stuck when it comes to building the levels. I found a tutorial on how to build a tiling engine and I just got completely confussed. I am … |
| | i'm not sure if a pointer can do the job of an iterator, or otherwise, or they are different things?  |
| | my problem is how to use if else statement with the use of character type string (char str[40]) for exemple char str[30]; cin>>str; or gets(str) or getline(str,30) if(str=="hello") cout<<"world"; i search this everywhere but every answer could not satisfied me.  |
| | I am having trouble finding out if I did the header correctly #include <iostream> #ifndef TREE #define TREE // Node class class Node { int key; Node* left; Node* right; public: Node() { key=-1; left = NULL; right = NULL; }; void setKey(int aKey) { key = aKey; }; void …  |
| | Are exceptions standardized in C++? I mean if the rules of exception handling might be changed in the future. i.e: int Funct1(int) throw(); // does it throw an exception?  |
 | Write a program to get 3 numbers from user for integer variable a, b,and c. if a is not zero, find out whether it is the common divisor of b and c. |
| | I am getting an error on this code. Is it to do with whats in the while loop? How do i get it working? Basically i want to be able to take in letter or number variables, and each would output something, and if they type exit it breaks out … |
| | So everything works right now, but I need that final section (will be turned into a function later) to display the number of A's, B's, C's, D's, and F's. It seems like it should be pretty simple, but nothing is working for me. Thanks! #include <iostream> using std::cout; using std::cin; …  |
| | I need to find a digit at a specific postion in a number. Example number 652796, user inputs a 4, "2" is displayed. I have the basis for it, but most of the time, the output is incorrect. Not sure what's wrong. #include <iostream> #include <cmath> using std::cout; using std::cin; …  |
| | Hello, as it can be inferred from profile, I am new. I have read the community guidelines and I have done prior research. I am a very weak coder(through my own fault). However, I like to believe I firm conceptual understanding. **So What is my problem?** I have an assignement … |
| | For the if discriminant < 0 statement, I need to not only display the error message, but I must display the complex roots in the correct format for complex numbers. How should I go about that? #include <iostream> #include <cmath> using std::cout; using std::cin; int main() { int a = … |
| | This program is supposed to run through the menus to eventually display the area or volume of a shape depending on the user's menu choices and input. However, it won't run the final menu and I'm not sure why. There aren't any problems when it goes through the debugger, it …  |
 | can someone help me, I need a program like this but it **must not use for loop**. or can someone revise it using **do loop**? I need it badly #here is the code: { int n, i, j; do{ printf("Enter a positive int n: "); scanf("%d",&n); } while (n < … |
| | Someone help me creating a this program. Well, I need a program that makes a triangle out of asterisk but it doesnt use "for" loop it only requires "do-while" loop. Actually I tried making one but it doesn't look like a triangle instead it jsut display a line of asterisk. … |
| | Following up on a discussion on [this thread](http://www.daniweb.com/software-development/cpp/threads/470519/looping-using-recursion/), I did some tests on the performance of recursion vs. iteration, and some interesting things happened, so I thought I would share the results. I'm gonna structure this a bit like a lab-report, because that's really the best way to put it. …  |
 | class Timerange{ public: Start_time start; End_time end; Timerange(string initstring){ //initstring xx:xx X, x:x //X->weekday string current=""; unsigned short mode=0; string timeA; string weekday; string timeB; for(unsigned short i = 0; i<initstring.length(); i++) { char c = initstring[i]; if (c==' '){ if (mode==0) timeA = current; else if (mode==1) weekday = …  |
| | // Expect to print values of arr[0] to arr[4] #include <iostream> #include <vector> using namespace std; int main() { vector<int *> ptrList; int arr[] = { 0, 10, 20, 30, 40 }; int * ptrArr = arr; for( int i=0; i< 5; i++ ) { ptrList.push_back( ptrArr+i ); } vector<int …  |
| | So I was asked to solve this question...however when i compile it, it doesn't work...could somebody tell me what's wrong and how to solve it (im guessing it's something to do with overloading since my lecturer was talking abt it just before this was given)? thanks a lot! #include <iostream> …  |
| | How To Determine The Best Score? I am doing a lab regarding 'guess number game' Actually,the answer should be the random number,but I set the exact number to 88,because it is easy for me to test other requirement. I need to printf("Best Score so far [X]") How to make comparison … |
| | Hi.here is a question I got for assignment.I am stuck in this for hours and couldnt com up with any logic.Any help will be highly appreciated.Thanks Depth-First-Search Q.No.1 The undirected unweighted graph with one selected vertex is given. Find the number of vertices in the connected component where the selected …  |
| | Hey everyone, So, I need help understanding why I'm not able sort my code: here is my code (so far) for my selection sort. I have only written the iterative form of Selection Sort, but I know how to do it recursively as well (which is required for my homework). …  |
 | Hello, First of all some background. My friend and I are having a bit of a competition over theoretically infinite number storage. We have agreed that the first person with a working arbitrary precision integer library with the theoretical ability to store an infinitely large number (IE: if the hard … |
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