I want to make a program that receives the number of lines and collumns of a matrix, a matrix of char, the number of pairs of coordinates and the coordinates. the program has to return the char (or chars) that are on those coordinates on the matrix.
Example:
receives
2 3 ABC DEF 2 1 1 1 2
returns
AB
this is how i tried to solve this problem:
Code:
#include
#define MAX 1000
int main() {
int nlin, ncol;
char mat[MAX][MAX];
int x[MAX], y[MAX];
int ncoords;
int l, c, n;
/* receiving variables and storing matrix.*/
[Code] .....
For some reason that i can't seem to find, this solution is not right.
So I have an array of char called s.This array has many words inside, each one separated by ''.The words are sorted by length (from bigger to smaller).I have have a char matrix with random things inside (it was not initialized) caled mat.I want to copy the first word from the array s to the matrix mat.
Code:
int nlin, ncol; /*number of lines and collumns.*/ int c,l,a,q; char mat [1000][1000]; char s[1000]; }
[code]....
I can't see where this is wrong, but, when i test it, it clearly is not right. for example, if the input is 3 lines and 3 columns for the matrix and the word is crate, the output is :
I have a problem with searching chars by diagonal not only the main, i have a chars in vector and I need to go though all possibilities (as shown in picture) the word has to be side/2 long so here i have 9, so word has to be 4 chars long how I need to do this?
I'm trying to find a < character in a document, get it's position. Then find > and get it's position. Then i want to delete all things between that but runtime is terminating my process so i don't know what to do.
Write a function to read and display the contents of names and marks. You then ask the user for a name and using the linear search return the index to the user. If -1 is returned then the name is not in the file. Otherwise write out the name and mark for that student.
Next, sort the arrays, write them out and then ask the user for a name to search for. This time use the binarySearch to return -1 or an index. Display the student's name and mark if found.
void getNames(ifstream& inStream, string names[], int marks[], int numElts); int linearSearch(const string names[], int numElts,string who); int binarySearch(const string names[], int numElts,string who); void selectionSort(string names[], int marks[],int numElts); void displayData(const string names[], const int marks[], int numElts); [Code] ....
Now I have worked up some stuff in parts but I am so lost and confused with these specific requirements: Previous questions asked me to sort out a linear search, a binary search and
LINEAR SEARCH:
int searchList(int list[], int numElems, int value) { int index = 0; // Used as a subscript to search array int position = -1; // To record position of search value bool found = false; // Flag to indicate if value was found
The program then asks the user for a search string, which may contain white space. The program should search the file for every occurrence of the search string. When the string is found, the line that contains it should be displayed in the following format
nnnnn:Line Contents
That is the line number of the line, 5 columns wide, right justified, followed by a colon, followed by the contents of the line.
And this is what I've got so far:
Code: #include<iostream> #include<fstream> #include<string> #include<iomanip> using namespace std; int main(int argc, char *argv[]) { ifstream inFile; string fileName,
[code]....
But this doesn't work. It prints everything in the file, not just the lines where the string is found.
Any way to use a string to access a specific item in a matrix of int[X].
I have a program which uses enums as iterators to reference a large amount of data. To select an item in the matrix, the user will enter a string, which is also an enum, which also must serve as an iterator for something in the matrix. Here is a toybox example:
The idea is the user executes the program by typing "./RUN First" to print out the first element in the MyNumbers array, "./RUN Second" to access the second, and so on. I can't use static numbers for the iterator. (i.e., "./RUN 1") I must reference by enum/string.
When run, the output of this problem is thus:
==================================================================== user@debian$ ./RUN Second Matrix[ atoi(Second) ]: 1 user@debian$ ====================================================================
I have the codes for such a problem where, to create a program that counts how many times the second string appears on the first string. Yes it counts if you put 1 letter only, but if you put 2, it is an error. As an example. If the first string is Harry Partear, and the second string is ar, it must count as 3. Here's the code:
Code:
#include <iostream> #include <conio.h> using namespace std; int main ()
I'm trying to "tokenize" a string using std::string functions, but I stored the text in a char array. When I try to convert it to a string, the string has the first character right but the rest is garbage.
// Get value from ListBox. char selectedValue[256]; memset(selectedValue, NULL, 256); SendMessage(GetDlgItem(hWnd, IDC_LB_CURRENTSCRIPT), LB_GETTEXT, selectedIndex, (LPARAM)selectedValue); // Convert to string. string val(selectedValue);
I am IT student and had a C++/C (oral + paper) exam today. One of the tasks was to write a 2D-Matrix (as the question said) class with following restrictions:
- No <string> header is allowed - Only Dtor needs to be implemented - No templates - Following should be possible:
Code: std::cout << mat1 + mat2 + "some randome string"; mat1 += mat2; So i did the following: In Matrix.h i wrote: Code: Class Matrix{ int rows, cols; char *arr[][];
[Code] .....
Now..this destructor made me loose some points since the Prof. said that it is not correct. The corrected version was:
Now, i agree on that error i made, but it is only in case we use the "new" keyword to reserve place dynamically for each string(for each char*). So this raised the question in my head about:
Since the following is allowed in C++
Code: char* str1 = "hello"; char* str2 = "you"; arr[1][3] = str1;//arr[1][3] was initialized to "_" without new keyword arr[6][0] = str2;//arr[6][0] was initialized to "_" without new keyword why would someone use the new keyword..
I mean like this:
Code: arr[1][3] = new char*[sizeof("sometext1")+1]; arr[1][3] = "sometext1"; arr[6][0] = new char*[sizeof("sometext2")+1]; arr[6][0] = "sometextw";
What is happening internally in C++ in both the cases(with and without new keyword)?
I just want to know the code of the program: Write code to accept matrix as aurgument and display its multiplication matrix which return its multiplication matrix.
but if the matrix is compressed_matrix type, there's something with it. the error log as below:
Check failed in file boost_1_48_0/boost/numeric/ublas/detail/matrix_assign.hpp at line 1078: detail::expression_type_check (m, cm) terminate called after throwing an instance of 'boost::numeric::ublas::external_logic' what(): external logic Aborted
Above is the code I have tried using and it stores data under *chr, it however only stores one letter rather than the entire word like for example string.
This sends the buffer to a LIN modem. My question is: can this be done better. If I have a astring of hex numbers like "09 98 88 55 42 FF 00 00 FF BD 89". How could I send this without manually makng a char with hex numbers?
I have a question on conversion between char & string. I have cut & pasted the part of the code from my C++ code and my function "decryptPwd" uses C style code with "char" etc.
I need to pass a string (mypwd) somehow to this function after conversion & then compare it to another string (newmypwd).
I tried - "decryptPwd(mypwd.c_str())==newmypwd.c_str()" but it did not work.
.. #include <string> .. char* decryptPwd(char hash[64]); main () { string mypwd; string newmypwd; if (decryptPwd(mypwd)==newmypwd)
