In my code the cout phrase is supposed to give me an angle in degrees. no matter which 2 points i enter in, it always outputs the angle between them to be 57. This is because the acos value of 0 in degrees is 57. The program compiles without error.
Here is the code:
/*
Synopsis: This program reads in the coordinates of two 2D vectors and outputs the angle between the vectors in degrees.
*/
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
// function prototypes
// ENTER FUNCTION PROTOTYPE FOR normalize() HERE.
void normalize(double & x, double & y);
I am currently trying to understand why this example for using an array as an argument in a function has a different result than what the lecture notes say it should be.
So supposedly sum should return with the value 28, but I get 27 no matter what. I also am not very good at reading and understanding what exactly the order of operations for this function are.
Code: #include <iostream> using namespace std;
int sum(const int array[], const int length) { long sum = 0; for (int i = 0; i < length; sum += array[++i]); return sum;
I am doing a written lab in my programming class in which we must write the output for three lines in a function. However, when I enter the code in my compiler I only get error messages. I was just wondering what the outputs under snap, crackle and pop should be and why.
#include <iostream> using namespace std; void snap (int i, int j); void crackle (int &a, int &B)/>; void pop (int &e, int f); int main () { int i = 1, j = 2;
Finally got to functions. Made a simple one that adds two numbers:
Code: int add(int a, int b){ cout<<"a+b="; return a+b; }
It refuses to give an output unless I use cout.
If I just call the function like so: "add(12, 24);", shouldn't it print out a+b=36? It only prints out "a+b=", unless I use "cout<<" ahead of the call.
My simple question is why does it need cout ahead of the call? Shouldn't "return" do its job and print out the number?
I have written a function that takes in a positive decimal and returns its Binary equivalent; however, the output always adds an additional zero to the binary. What could I do to get rid of it?
If the number is 7, it outputs 0111 instead of 111.
I want to create a function that will accept input from the user and return the input, to be used for further calculation. I know how to accept and return with integers as parameters , but how do i do it with arrays?
Suppose there is an array of numbers arr[]. Now, i want a function that accepts the input from the user, and return the array for further manipulation.
For example, if the array is arr[5], then i should call a function and accept the values from the user. Then, i should return the imputed values and print the same. How can i do this.
I have to convert a binary value from an input file (the name of which is given by the user) and then convert the binary to decimal value and print that in an output file.
Right now it is compiling just fine with no error messages, but when I run the program, it doesn't end or print to the output file.
Code: #include <iostream> int multiply (double x, double y) { double result = x*y; return (result);
[Code] ....
I get the answer 5.94 (which is what I'm looking for). I can't work out why the first example is not outputting a decimal number. I have set the variables as a double so I just can't see why this is not working for me.
Taken from Accelerated C++ book, I modified those code to use getline() instead of std::cin >> only to find out that the output has extra line. Why is that so?
#include <iostream> #include <string> int main() { std::cout << "What is your name?" << std::endl; std::string name;
[Code] .....
What is your name? Naruto ***************** * * * Hello, Naruto * * * *****************
Notice one asterisk after the greeting where it should be in the same line as the greeting.
So I am writing this code that analyzes a file called "analysis.txt" and prints out in an ouput file (called "report.txt") the results of the analysis, i.e.,(the frequency of all alphabet letters present in the file).
I am having trouble with outputing on the file2.
here is what I have:
Code:
#include<iostream> #include<fstream> using namespace std; ifstream file1;
[Code]....
I tried to lose the "<<" after the file 2, but it's still giving me an error. how to output a void function on a text file?
I am trying to find a way to put a getSmallest function in here so that it will output smallest integer entered. If it is just an arbitrary amount of #'s and I don't know what will be entered I am confused. Both on how to do it and how to link my function to my loop.
Code: /* Prompts user and gets integer numbers from keyboard, one number at a time. Ends program when 99999 entered. and displays various results. Written by: Date: 10/20/14 */ #include <stdio.h> #include <stdlib.h>
[Code] .....
Could I take this and just replace all variables a, b, and c with getNumber, where would I link/declare smallest?
Code: /* ==================== smallest ====================== This function returns the smallest of 3 integers. Pre given 3 integers Post the smallest integer returned */ int smallest (int a, int b, int c) {
#include <iostream> struct Object { int size; // Want to avoid this because size is (almost always) constant Object (int s): size(s) {} // for every Object subtype.
[Code] ....
I want this:
#include <iostream> struct Object { virtual int getSize() const = 0; }; struct Block: Object { int getSize() const {return 5;} // always 5, except once in a blue moon it may change
[Code] ....
The Decorator Pattern works (getSize() can then return 6) but it is a poor choice for my program because it will cause more problems (due to many containers holding its old address, among other things. Any way to achieve this without any change of address, and without creating new storage somewhere, either inside the class or outside the class (too much responsibility to follow that stored value for the rest of the program just for this rare change, and creating a data member uses up too much memory for the many, many Block instances)?
Basically I'm supposed to use a while loop to generate a random number and use a switch statement to output the appropriate information. I feel like I'm missing a few things that are very simple.
The errors are: warning C4244: 'argument' : conversion from 'time_t' to 'unsigned int', possible loss of data warning C4700: uninitialized local variable 'randomNumber' used
I am trying to construct a program without a main function that outputs stars but at the same time outputs the number and a colon after the number but before the number of star. This is the coding i have so far.
I am working on a project and decided to try something simple before I start adding items. I am calling a function from main and that function has a file pointer.
Here is my main.cpp
Code: #include <cstdio> #include <string> #include <iostream> #include "main.h" extern FILE *fp; using namespace std; int main(int argc, char *argv[])
My test file consists of several characters and digits. Nothing special and I at this point in time do not have any type of formatting that needs to be adhered to. I am simply wanting to read the file character by character and print it out. When I run the program, I get this symbol:
Code: If I use a printf statement, such as: Code: printf("%s ", nextChar);
So the latest challenge from jumping into c++ is as following.
Code: Write a function that builds the multiplication table of arbitrary dimensions This chapter also talks a ton about 2d arrays.
So I've built my program thus far as this.
Code: #include <iostream> using namespace std; int drawTable(int,int); int main()
[Code] .....
So basically, the idea is that I can use the arrays dimensions as a placeholder, and just multiple them to get that specific spot, so table[0][0] = 0, [0][1] = 0 and so on. However the output actually seems to be randomly generated numbers so I'd like to ask, what am I doing wrong? Am I on the right track? Or have I missed the bus stop completely.
I have written a C++ program I have multiple of CSV file used as input, which I open one at a time and close it after extracting data to a output file which is the only file.
I run getline(inFile,line); outFile << line << endl;
I run this code, and only part of it is goes to the output file I got, also have spacing randomly to specific file and inconsistent
But when I slower the code, like system("Pause") in the loop, I can get extract what I want perfectly....
Is my program running to fast, why getline would be skipping part of what things I want?
How to output vector contents using the push_back function. My program reads in values just fine, but it does not output anything and I've been stuck on why.
here is my code:
#include <iostream> #include <array> #include <vector> using namespace std; int duplicate( vector < int > &vector1, const int value, const int counter)
So I have an array portfolio [i][j] where i and j are determined by inputs by the user. I can get the code to fill the array with the correct values; however, I can not figure out how to output the array to csv.
Is there a simple way to output to a csv? Is it easier to create the csv file and just write to it?
