C/C++ :: Program To Sum Rows And Columns Of A Matrix?
Apr 23, 2014
Im using apmatrix and im inputting values into a 4 by 4 matrix and im getting all these errors that have nothing to do with my cpp file so im guessing its apmatrixies fault. Also I put in the cpp and header file of both apmatrix and apvector into my project folder. Heres my code:
error C1189: #error : The C++ Standard Library forbids macroizing keywords. Enable warning C4005 to find the forbidden macro.c:program filesmicrosoft visual studio 11.0vcincludexkeycheck.h2421TheMatrix
4IntelliSense: identifier "EMIT" is undefinedc:Program FilesMicrosoft Visual Studio 11.0VCincludeyvals.h4911TheMatrix
I am trying to iterate a matrix in order to exchange rows and columns element by element. Although the function that exchanges the rows has come out well, i don't seem to figure out how to do the same on columns.The columns switch for a matrix like
I have a N queens (actually 8 queens to be specific) program that accepts the numbers in order by row. I need to get it so it accepts the numbers in order by column. At first glance I thought it was just one space different, but it turned out not to be and how to get the one space difference in there. My current code (which I'm aware isn't doing the column accepting right) is:
Code:
#include <iostream> using namespace std; int main() { int board[8]; cout << "Enter the columns containing queens, in order by column: "; for(int i = 0; i < 8; ++i) { cin >> board[i];
[Code]...
What the output should be:
Code:
Enter the rows containing queens, in order by column:
I am writing a program that deals with 2d arrays. The program inputs the number of rows and columns and asks for the entries. When the program run and compiles it works perfectly until it outputs then it gives me a warning.
Here is my code:
#include <iostream> #include <cstdlib> using namespace std; int main() { int row1=0,col1=0,i,j; //int a[row1][col1]; int** a= new int*[row1];
[Code]...
I am learning how to do this before I can move on so it can read a text file of numbers.
Also I am having problems with ////delete [] a[];///// I took it out because it made my code compile and run but when I add it in, it gives me an error:
matrixtesting.cpp|56|error: expected primary-expression before ']' token|
I know this expression is suppose to deallocate the array.
I'm not sure why Im getting a wrong Sum. of the Columns.
Write a method that returns the sum of all the elements in a specific column in a matrix using the following header:
double sumColumn(const double m[] [SIZE], int rowSize, int columnIndex)
Write a test program that reads a 3-by-4 matrix and displays the sum of each column. here is a sample run:
Enter a 3-by-4 matrix row by row: 1.5 2 3 4 5.5 6 7 8 9.5 1 3 1 Sum of the elements at column 0 is 16.5 Sum of the elements at column 1 is 9.0 Sum of the elements at column 2 is 13.0 Sum of the elements at column 3 is 13.0
#include <iostream> using namespace std; const int SIZE = 4; int rowSize=3;
how to make the it all work later...but in the mean time how can i get this to display this? Note it has to be made using as a console program. The "Description" and "Cost/ib" collums will be referenced through use of a header file. all else is done by user input and calculations.
I'm having trouble trying to get my loop program to display multiples of 4 in rows and columns. My objective is to print multiples of 4 that are less than 100 in a 4 by 4 format.
So far when I write the code I get 4 8 12 16 20 .... 96 all on the same line.
This is what I expect the code to look like if done correctly.
How i draw such a thing in .TXT file using file handling. This output must be in columns and rows and in well arranged form.
No. Name Roll No. Physic Math Compuer Science Islamiyat Pak Studies Average Grade 1 Student Name 12345 50 60 70 76 90 81 A 2 Student Name 12345 55 52 50 80 58 55 C 3 Student Name 12345 85 66 90 88 77 75 B 4 Student Name 12345 40 70 91 45 56 85 A 5 Student Name 12345 30 80 80 55 93 45 D
Here's my code for adding the rows and columns. My problem is that my program displays an incorrect output.
main() { int a[20][20],r,c,y,x,sum=0,rn,cn,cs=0,rs=0; cout<<"Enter number of columns : "; cin>>cn;
[Code] .....
This should be the output Enter number of columns: 4 Enter number of rows: 3 Enter twelve numbers: 9 2 3 4 2 3 1 2 5 6 7 8
The numbers are: 9234 2312 5678 Sum of number 1 column is: 16 Sum of number 2 column is: 11 Sum of number 3 column is: 11 Sum of number 4 column is: 14 Sum of number 1 row is: 18 Sum of number 2 row is: 8 Sum of number 3 row is: 26
I am trying to sort a Report Table by which the user can enter any column or row number and output the results. And also sort by names as well. And from my code
#include "stdafx.h" #include<iostream> #include <string> #include<iomanip> using namespace std; #include <stdlib.h> /* srand, rand */ #include <time.h> /* time */
[Code] .....
I know I need to start somewhere with a void function and put in a selection sort.
I want to select three columns from my text file i.e. Empl No, Start Date and Created Date. After selecting this, I want to insert the data into a database.
I have attached a copy of the text file.
I have the following code so far:
if (File.Exists(filename)) { string[] lines = File.ReadAllLines(filename); for (int y = 0; y < lines.Length; y++) { Console.WriteLine(lines[y].ToString()); }
How do i select specific details for each employee
You will write a program that uses a multidimensional array having 3 rows and 8 columns and sorts each of the rows using both a bubble sort and a selection sort.
You must declare the array inside of main. You will have a for loop containing the calls to bubbleSort and selectionSort. You need to pass into function bubbleSort and selectionSort the following: 1) each column of the multidimensional array, 2) the size of the column, and 3) a particular row number of the multidimensional array to be used for printing out the "pass" shown on the following pages.
I keep getting an error that the identifier for bubbleSort and selectionSort is not found. (Error C3861)
Also, I feel like I'm missing something in int main() to get it to sort properly.
Code: # include <iostream> using namespace std; int main() { const int SIZE1 = 3; const int SIZE2 = 8; int arr [SIZE1][SIZE2] = { { 105, 102, 107, 103, 106, 100, 104, 101 },
I want to swap the value of two rows in matrix among themselves, the index of rows are user defined.
void swapRows(int matrix[M][N], int m, int n, unsigned short R1, unsigned short R2) { for (int i=0; i<m; i++) { for (int j=0; j<n; j++) { //dunno what to put in here
Use the linkedStackType class (Array implementation of stack) and write a function reverseCols to reverse the order of columns in the matrix. Note that reverseCols is not a member function of the Matrix class therefore only the public interface of matrix can be used.
//Implementation of Stacks as Array template<class Type> class stackType: public stackADT<Type> { public: const stackType<Type>& operator=(const stackType<Type>&);
[Code] ....
What is the correct solution must be to reverse the columns of the matrix?
I want to be able to keep on adding a row to my datagrid every time i click a button, the row will hold the text of the text box and the combobox in its individual cells, is there a way to do this without inserting a ridiculous amount of code?
I need to make a program that returns pascal's triangle of N rows. I actually need to make a function of format "int **func(int n)". I don't know how to go about that, so I am trying this method first, but I seem to be getting an endless loop.
Code: #include <stdlib.h>#include <stdio.h> int *rowN(int rowNum, int* prevRow) { int *rowN; rowN=realloc(rowN,(rowNum+1)*sizeof(int));
The program need to find mean of elements in columns which are divided by 3. And to print which colmn has the greater mean
Example
For matrix: 7 9 5 17 15 30 29 34 60
Program print: 0 12 45. The greater mean: 3 column.
I wrote this code and it prints 0 12 45 idk how to find which column has greater mean?
Code:
#include <stdio.h> #define max 50 int main() {int n,m,i,j,k,d,br=0,suma; int a[max][max]; int b[max][max]; printf("Kolku redici i kolku koloni da imat matricite: "); scanf("%d %d ", &n,&m);
Working on an assignment and I've hit TWO stumbling blocks. I now have to take the first line from a .txt file and use that number to determine the size of rows to create in my program. I am using fscanf but the program hangs. How can I read in this number, store it and use it in a for loop?
The second issue is after reading this number I have to print each number in the .txt file under a different column. (Note that it skips a line after reading the row count.) The .txt file is set up as follows:
Here your supposed to create a program that takes in information and formats it into three columns.
I can't seem to use the float variable unitprice with decimal places here for, if I try to use %.1f and type in an input, the program seems to skip over the second scanf function, not allowing me to put input into the third scanf function as the program runs before I can.
I can use %f on its own and it works but this creates too many zeroes(and you're supposed to set the currency limit to $99999.99).
Code: #include <stdio.h> int main(void) { int itemno, month, year, day; float unitprice;
[Code]....
So the output should look like three columns. It's just the float that is the issue here....
I just started Linear Algebra for my programming degree and to full understand everything I want to put it into code and make my own "matrix calculator." I have all the theory but I am having issues keeping the matrix variable and moving it around the class' functions to create it and output it. Once I know I have it saved I think I can get the addition/multiplication to work. Here is the code I have so far:
#include <string> #include <iostream> using namespace std; class matrix {
I write this code for Inverse of matrix in C language . But there is error in determinant function that say "can not convert 'float' to 'float(*)[20]' for argument '1' to 'float determinant(float(*)[20])' " ....
/* a program to calculate inverse of matrix (n*n)*/ //actually one of the way to calculate inverse of matrix is : A^(-1) = 1/|A| * C(t) that A is matrix and c(t) is taranahade A
#include <stdio.h>; #include <conio.h>; #include <string.h>; #include <stdlib.h>; const int max=20; int i , j , n , k , size=0 , row , column ; float num , det=0 , inverse_matrix[max][max] , matrix[max][max] , new_mat[max][max] , m_minor[max][max] , m_Transpose[max][max];
