C++ :: Printing Substrings From Input String
May 24, 2014
I'm having trouble printing the text in between separators like commas, periods, and at signs. I'm following Jumping into C++ Chapter 19 Practice Problem 2.
This is what I have so far:
Code:
#include <iostream>#include <string>
usingnamespacestd;
int findNeedle (char separator, string inputLine) {
int needleAppearences = 0;
[Code] ....
And this was my test run output:
Enter the contact info. one, two, three, ,? , one two, th three, Program ended with exit code: 0
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Apr 17, 2013
I am using the (fairly) new STL implementation, which I just became aware of, of regexes. Seems to be an implementation of boost::regex Anyway, I have code, which I would like to use to get ALL matches within a string.
My String is: "Unseen University - Ankh-Morpork"
My regex is (simply): "Un" ;)
using code:
const char *reg_esp = "Un";
std::regex rgx(reg_esp);
std::cmatch matches;
const char *target = "Unseen University - Ankh-Morpork";
[Code] .....
gives output:
"Un" (one line only). How do I get this to match ALL instances of "Un" (i.e. that the output is "UnUn", i.e Un two times)?
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Jan 10, 2012
I am trying to do this question: [URL] .....
Basically trying to find all substrings and then sorting it lexicographically. This program gives me the correct results, when I test it but it gives me "Time Limit Exceeded" when I submit it.
#include <iostream>
#include <cstring>
#include <set>
#include <vector>
using namespace std;
int main() {
int num;
cin>>num;
set<string> sub;
[Code] ....
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Oct 26, 2013
I would like to print a multiplication table, with the dimension n given as input. I attached how the table looks like for n=7.
How do you output the character "-" in that sequence? The first and last numbers have 13 "-" characters before and after them, but the numbers in between have 8 "-" characters.
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Jan 15, 2014
//Finding prime numbers
#include <iostream>
using namespace std;
[Code]....
/*The program currently prints all the prime numbers up to n (For example, if 7 is entered, it prints out: 1, 2, 3, 5, 7. What I want it to do, is print out the first 7 numbers; 1, 2, 3, 5, 7, 11, 13.
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Feb 22, 2013
I wrote code for printing a double triangle. Its woking fine upto input is 7. but when the input is 8 the output is disturbed. the code is this.
#include<iostream>
using namespace std;
int main() {
int a;
cout<<"Enter a number"<<endl;
[Code] ....
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Dec 15, 2014
I have to make a program that displays a square of asterisks based on the users input. Here is what I have so far.
#include<iostream>
using namespace std;
int main(){
int number;
cout << "Enter a number: ";
cin >> number;
for (int i = 0; i < number; i++){
[Code] ....
But the square needs to be hollow like this. So if the user enters 5 then the following square will be shown.
*****
* *
* *
* *
*****
How to make it do this.
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Aug 24, 2013
these are the errors that I'm getting from an online c++ compiler
// main.cpp:4:10: error: #include expects "FILENAME" or
// main.cpp: In function 'void permute(char*, int)':
// main.cpp:17:9: error: 'f' was not declared in this scope
I don't understand how to print full_string to a file!// otherwise, I know that it gives the correct output -- 90 strings.
#include <string>
#include <iostream>
#include <fstream>
#include >ios> // line 4 error
using namespace std;
char full_string[] = "112233";
[code]....
//iter_swap – it just swaps the elements pointed to by the respective pointers without changing the pointers themselves. so, it's basically equivalent to the function:
void iter_swap(char *ptr1, char *ptr2) {
char tmp = *ptr1; *ptr1 = *ptr2;
*ptr2 = tmp;
}
// min_element – finds the location of the minimum element that exists in the given range. in this case,
it is the char* pointer pointing to the location of that element. it can be implemented like:
char *min_element(char *start, char *end) {
// end is 1 beyond the last valid element
if(start == end) return end; // empty range
char *min_pos = start;
for(char *iter = start+1; iter != end; ++iter)
[code]....
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Dec 26, 2013
Code:
#include <iostream>
#include <string>
using namespace std;
int main() {
string s="Last Assignment/n";
cout<<j[1]<<j[2]<<j[3];
I don't understand how it printing each element of whole string. Like L a s. But I did not declared array.
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Jan 25, 2013
Code:
#include<stdio.h>
#include<string.h>
#define a 15
[Code]....
I am trying to print all combinations of a string but I couldn't figure out how to do loop for it. Code works only 2-3-4 letters words
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Jan 3, 2015
I am trying to save 5 persons names to a struct, and then printing them afterwards, shortly before the program ends. I tried to print the char string out right after it has been copied over, and it showed fine, but when i try to write it out right at the end of the program (its in a separate function) the terminal just prints gibberish.
the function looks like this:
Code:
int printUser(){
printf("Following patients have been recorded in this session:
");
struct database patient1;
struct database patient2;
struct database patient3;
[Code]...
the output looks like this(as you can se in under structest, that it shows the correct string, it also uses printf):
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May 27, 2014
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 :
cra
t
e
but it should be:
cra
t
e
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Feb 17, 2013
I am trying to write a program for printing all the combinations of a string. Why this program is giving the error message.
"First-chance exception at 0x761bc41f in word.exe: Microsoft C++ exception: std::out_of_range at memory location 0x0026f6b4..
Unhandled exception at 0x761bc41f in word.exe: Microsoft C++ exception: std::out_of_range at memory location 0x0026f6b4.." when i try to run this in MVS 2010
#include<iostream>
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include<conio.h>
void combination(std::string input,int length,std::string buffer,int allowedno)
[Code] .....
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May 14, 2014
How to print a string in reverse order(for example: "today is Wednesday " to "Wednesday is today"). My professor said we should begin with a null string and build it one word at a time.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int nwords(string);
[Code] .....
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Feb 21, 2015
i couldnt solve the algorithm exactly. The program asks the user for a string. "Bugun h@v@ cok g'uzel" for example. then the program asks for another string. If that string doesnt exists in the main string program should say there isnt any substring. If it exist then the program should print the remaining part of main string. For example:
Write the first string: Tod@y weather is be'@utiful
write the substring : ug
>>ugun h@v@ cok guzel
write the substring :wldnqwbdbj
>>there isnt any substring
Here where i came so far
#include <stdio.h>
int main()
{
char mainstr[50],substr[50];
[Code]....
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Dec 14, 2014
I'm new to c++, so how to print the contents of a map that contains a string and a class of integers for option 1. what formatting should I use?
#include <iomanip>
#include <vector>
#include <sstream>
#include <map>
#include "IPHost.h"
#include "EncryptedConnection.h"
[Code] .....
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Feb 23, 2015
I'm reading in a string from the command line into a char array followed by a series of ints which are read into an int array.
The command line
Code: lab3 word word word 0 0 2 3 results in the following output:
Code: Word: .N=▒
Number of Words: 0
Word: .N=▒word word word
Number of Words: 3
Num: 0
Num: 0
Num: 2
Num: 3
Here is the source code:
int main(int argc, char *argv[]){
if(argc < 2){
//command line must have at least three arguments (one
//char, one integer)
printf("Error: invalid number of arguments
[Code] .....
Where is the .N=▒ coming from?
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Jan 27, 2014
For the last part of this problem, if player 2 loses the game of hangman, I need to display the letters they did get right. In order to do that, I believe that I need to traverse vector v for the elements that exist in the string hiddenword, and then print those characters that match.
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int letterFill (char, string, string&);
[Code] ....
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Oct 19, 2014
Very new to programming, and I know that there must be another way on inputting a string into each array cells not by just inputting it one by one, but as a whole. My code at the meantime is: [URL]
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Jul 14, 2014
I have problem with string compare. I want to compare the string user input with a string in binary. And I don't know how to do it. Problem in function login();Here is the code: And you also can download file in attachment too..
Code:
#include<conio.h>#include<dos.h>
#include<stdio.h>
#include<process.h>
#include<string.h>
char nsb=1;
char ch, password[20], passlogin[20], inputpass[20], checked[20];
FILE *fp;
}
[code]....
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May 29, 2014
I wrote a program that reads a list from a file and stores it in a string type vector. Now, I want the user to input a word so that the program can search the vector to see if that word already exists. I have used every possible way of reading input from the console and storing it in order to compare with the vector but it never results in a match. When I print the input string and the vector string they are exactly the same thing (or at least print to the console as if they were). I've tried using getline; using cin direct to a string var; using cin to a char array and then casting to string using string str(arr); I even added a newline at the end just in case and STILL I cannot get a match.
vector <string> currentSet; //read a list in from a file and has 9 items in it
cin.ignore();
string line;
getline(cin, line);
if(line == vector[0]){//if printed to console line is HEAT and vector[0] is HEAT
cout<<"match"<<endl;
}
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Dec 3, 2014
write a program that prompts the user to input a string and outputs the string in uppercase letters. (Use a character array to store the string.) Does this follow the criteria? This program is very similar to one I found on these forums but I have one problem, it outputs everything backwards! EX: dogs will output to SGOD. What I need to do to make it output correctly, I think it may have to do with getline?
#include <iostream>
#include <cctype>
#include <cstring>
using namespace std;
int main() {
char let[100];
cout << "Enter what you would like to be UPPERCASE: ";
[Code] ....
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Feb 7, 2013
I am stuck in this program, Be given a string of chars, where each single char belongs to the following alphabet: a..zA..Z0..9 (So, in the string there are only lowercases, uppercases and digits. No blank, no comma, ...). For every char of the given alphabet, count how many times in the string
1-- the char belong to a sequence of identical chars whose length is at least three (i.e.: in the string cc74uyrpfccc348fhsjcccc3848djccccc484jd for three times the character 'c' satisfies this condition)
Code:
#include<stdio.h>
#include<conio.h>
#include<string.h>
[Code]...
2-what is the longest substring of characters strictly rising interm of ASCII code(the following is greater (>) of the previous)
3- what is the longest substring of successive characters interm of given string rannge (i.e.: fhkjshdfruytyzABCDEfglsj => 7)
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Jun 26, 2014
/*assume array is already initialized and declared and is of array type string.*/
int i = 2;
int j = 1;
string newvalue;
cout<<"Current value at array[i][j] is "<<array[i][j]<<endl;
cout<<"Enter new value "<<endl;
cin>>newvalue;
array[i][j]= newvalue; //PROBLEM IS IN THIS LINE.
cout<<endl;
cout<<array[i][j]<<endl;
I'm having lots of trouble with storing a cin string text into a string array. It just seem that after I cin newvalue, the program crashes. Is this way of storing it considered illegal? I'm just a beginner with 5 months of coding experience in C++.
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Dec 6, 2013
Following is the program I wrote it basically takes 9 inputs and then save them into binary file. then print out the data stored in binary data and find inverse of it then print the inverse out. but its stuck in a loop somewhere.
Code:
#include <stdio.h>
int main() {
int a[3][3],i,j;
float determinant=0;
int x;
FILE *fp = fopen ("file.bin", "wb");
[Code] .....
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Oct 20, 2014
i wanna put an integer into a string for example:
Code:
string name;
int num=8;
name= "George"
//
I want in the end of George to pas the num variable i ve seen some examples but ive not yet come up with a solution like str.insert();
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