C++ :: Read List Of Numbers From A File And Then Print Out In Reverse Order
Apr 6, 2013
1. Construct a class diagram that can be used to represent food items. A type of food can be classified as basic or prepared. Basic food items can be further classified as meat, fruit, veg or Grain. The services provide by the class should be the ability to enter data for new food, to change data for food and to display existing data about food.
using this class definition write a main program to include a simple menu that offers the following choices:
1. Add food
2. Modify Food
3. Delete Food
4. Exit this menu
2. Read a list of numbers from a file and then print them out in reverse order. State whether the list is palindromic or not.
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Nov 29, 2014
Implement a recursive function named void printBack(DoublyLinkedNode<T>* node) for the class DoublyLinkedCircularList which will print out the elements in the list from back to front. The function is initially called with the first node in the list. You may not make use of the previous(prev) links
This is my solution where I got 2 out of a possible 3 marks:
template<class T>
void DoublyLinkedCircularList<T> :: printBack(DoublyLinkedNode<T>* node) {
if(node->next == NULL) //Correct- 1 mark
return 0;
else
printBack(node->next); //Correct - 1 mark
cout << current-> element << " ";
}
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Apr 21, 2013
Write a for loop statement to print the numbers from 1 to 10 in reverse order separated by star :
10*9*8*7*6*5*4*3*2*1
i try to do it but it show me like this :
10*9*8*7*6*5*4*3*2*1*
how do i write to show me like the first one ?
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Nov 5, 2013
works fine without the for loop.... if i use for loop...it doesnt give the output...
Code: #include<iostream>
#include<conio.h>
#include<fstream>
[Code]....
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Jan 5, 2015
Need to correct the errors. i've done so far.
#include<iostream>
#include<fstream>
#include<cstdlib>
#include<iomanip>
using namespace std;
int main() {
ifstream fin; char ch; int size=0;
[Code]...
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Jan 28, 2014
Using the array to accept 10 testscore. Calculate and print the highest, lowest, fifth test score entered and all the test score entered in reverse order.
How i would get it to print the highest,and lowest and in reverse order. I'm confused as to what to do...
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May 3, 2014
I was trying to reverse a linklist in reverse direction using the recursion. I was able to reverse n - 1 element but it is not printing the first one. Below is my code.
Code:
typedef struct linklist {
int data;
linklist *next;
};
void add(int data,linklist **node) {
[code]....
This is happening since recursion is starting from second node, which is due to reason not printing the first one when recursion print values from stack once
node != NULL
Condition is met.
Currently I am using below statement for printing the first element;
reverse_recur(node);
printf("
Print In Reverse Order
%d
",node->data);
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Apr 28, 2015
I have to write a c program that will allow the user to enter names with ages. The name will be no longer than 40 characters. The name and age should be stored in a node of a doubly linked list. I cant use global data. I need to use 3 subroutines. the first one needs to enter the data and pass the head and tail pointers to the subroutine. the next subroutine needs to print the names and ages to the screen and file output.txt from first to last. the last subroutine needs to print out names and ages to the screen and file output.txt from the last to first.
Im getting several errors when i try to run this program. The first subroutine to get the data from the user and build the double linked list. but i seem to be having issues.
#include <stdio.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
int entry(char [][41], int []); // subroutine used for data entry //
void printit(char [][41], int [], int); // subroutine used for data printing //
void reverseprintit(char [][41], int [], int); // subroutine used for reverse data printing //
[Code] .....
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Sep 23, 2014
I am trying to make a program that will convert a list of binary numbers from a file into decimal and print the decimal to the screen. I have no problem doing the conversion, the problem comes up when our teacher wants the input file in a format as such:
3
10110101
11111111
10101010
The first number is supposed to tell the program how many different 8bit strings it is going to have to convert, and then the following lines are those binary numbers.
I am not very experienced with file inputs, and I know how to open files and read lines in.. The problem is, how to say "ok the first line says 3, so now I have to convert the next 3 lines" . I am assuming it is just a simple loop that I am missing....
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Sep 24, 2013
The next step for my project is to take data from a file, and create a new file with the same data, but in reverse order. If a file has the following values:
1
2
3
4
5
The program should create a new file with the following values:
5
4
3
2
1
Seems pretty straight forward, yet I am hitting a snag when I try to compile my program:
Code:
#include <stdio.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
[Code] ....
The following errors occur when I try to compile the fore mentioned code:
intrev.c: In function 'main':
intrev.c:25: warning: unused variable 'out'
intrev.c: At top level:
intrev.c:39: error: expected identifier or '(' before 'while'
[Code] .....
Now I am not concerned with "unused variable 'out'" as it is used, just in a for loop. Is this a problem?
I'm not entirely sure why it's giving me the error at line 39. I've gone over this a couple times and it doesn't look like I've missed any methods which need to be closed. Maybe I've missed something?
I'm also not sure why I am getting an error when I try to close the opened files. I've done this before in the same manner, but without errors. Not sure why I am now, but my guess is that it has something to do with the error on line 39.
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Nov 11, 2013
I need my program to read a list of numbers from and input file, random.txt, and calculate the following statistics on those numbers:
A. The number of numbers in the file.
B. The sum of all the numbers in the file.
C. The average of all the numbers in the file.
D. The largest number in the file.
E. The smallest number in the file.
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
[Code]......
This is what I have so far but I'm not sure if it is right. I can't get the input file to open.
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Apr 13, 2014
A Bookseller makes special discount for multiple orders of a book as follows:
AMOUNT and DISCOUNT as follows.
5-9 5% 10-14 10% 15-19 15% 20+ 20%
Write a C main function to read the amount of order from the standard input and compute and print the total price of the given order after the discount. Assume that unit price of a book is 10.00$
My problem is that.When i start with this
Code:
#include<stdio.h>
#include <stdlib.h>
int main(void)
{
int number;
float TotalPrice;
printf("enter a number:");
[Code] ....
I get 0 if i enter a number between 0 and 4(0 and 4 included). I don't know where I am doing a mistake. I also want to know if i can handle this buy just if statements. or how can i do it by while and for loops ?
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Apr 29, 2014
I want to write a program to read in 15 integers from the user, and then store them in a 5x3 array, and print out the numbers as a 3x5 array.
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Apr 6, 2014
My C programming class wants us to write a program to read integers into an array, sort the numbers and print out the occurrence of each number. I've tried everything that I can think of but the core dump is still occurring.
void countValues ( FILE *inf, int list[], int size ); /* Function prototypes. */
void printFrequencies( const int list[], int size );
int main (void) {
int status = EXIT_SUCCESS; /* defaulting status to success. */
FILE *inf = fopen( "numbers.txt", "r" ); /* input data file */
[Code] .....
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Jan 25, 2014
So I need to read in a .txt file and sort it by SSN in ascending order. How to start this but here's what I have so far:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
struct Information {
char name[25];
long SSN;
[Code] .....
Also here is the contents of the .txt file:
Matthews,Jocob
459237148
19
3930 4th Blvd, Yourcity, NJ 88710
......
and so on.
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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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Jun 3, 2013
I need to do program where i will input sentence and then output it in reverse order. Example: today is Monday ----> Monday is today. So I have this:
#include <iostream>
#include <cstring>
using namespace std;
int main() {
char niz[20],niz2[20];
int lenght,k=0;
[Code] ....
For output I only get one word of sentence,example: Monday is today--->today and nothing else.
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Jul 15, 2013
I have two vectors of float that I need to sort in reverse order. reverse() seems to work for one of them, but not the other. I have toggled between sort() and reverse(). for one vector, the expected behavior is seen and the order reverses. For the other, there is no change in order.
This is very simple code, so it's hard to imagine what is going wrong.
Code:
vector<float> vec1, vec2;
vec1[0] = 14.1102; vec1[1] = 14.1145;
vec2[0] = 15.8508; vec2[1] = 26.0842;
sort( vec1.begin(), vec1.end() );
sort( vec2.begin(), vec2.end() );
[Code] ......
Printout is,
Code:
vector 1 sort
14.1102
14.1145
vector 2 sort
15.8508
26.0842
vector 1 reverse
14.1102
14.1145
vector 2 reverse
26.0842
15.8508
You can see that the order of the first vector did not change. Am I right in suspecting that the numbers are too similar for what ever method reverse() uses to determine the difference between values?
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Mar 27, 2013
Write a program which reads a stream of numbers from a file, and writes only the positive numbers to a second file. The user should be prompted to enter the names of both the input file and output file in main(), and then main() will open both files. Another function named process() must then be called to read all the numbers from the input file and write the positive numbers to the output file. Note that you must pass the open stream variables for each file as arguments to the process() function, and that you need to (always) double check that the files opened successfully before using them.
This is what I have so far but its not working out!
#include <iostream>
#include <fstream>
#include <stdlib.h>
using namespace std;
int process(ifstream &inf, ofstream &outf);
[Code] ....
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Dec 1, 2014
I need fastest method to reverse order of bytes in my char array.
For example i have:
unsigned char buf[8];
// consider data stored in buf is 88 77 66 55 44 33 22 11
// how to reverse it to: 11 22 33 44 55 66 77 88
// currently i can do it by equal assignment , i make another buf like:
unsigned char buf_ok[8];
[Code] ....
// This does reverse the bytes as i want but its very slow , i am looking for fast method ..
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Apr 2, 2012
I am trying to write a program that takes a sentence and reverses the word order.
For instance This is a Bird would become Bird a is This
Code :
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main (void) {
char input_buffer[1024];
char middle[1024];
[Code] ....
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Aug 7, 2014
I'm trying to use a priority queue sorting in reverse order to take a vector or 2d array. The problem is that I want to sort by the vector/array cell value but keep the reference to the vector/array index of the value. I don't know quite howto keep them both related so when I pop. I can find the corresponding cell.
priority_queue<int, vector<int>, greater<int> > Open;
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Jul 15, 2013
Ok, I think I got the main idea of the I/O chapter. Though I think I might be oversimplifying the program because I am getting an interesting error.
Goal here is to read numbers from a file and print the numbers with totals for two of the columns and a calculated average for of the totals.
NOTE: The tables for the info from file look a lot better on my end. [QUOTE] seems to mess it up a bit from copying and pasting.
Info from problem:
Car No. Miles Driven Gallons Used
----------------------------------------------------
54 250 19
62 525 38
71 123 6
85 1,322 86
97 235 14
carinfo.txt file:
54 250 19
62 525 38
71 123 6
85 1322 86
97 235 14
program:
Code: updated code
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Mar 8, 2013
Code:
#include <stdio.h>
#include <stdlib.h>
int main (int argc, char *argv[])
{
char buffer[256];
FILE * myfile;
myfile = fopen("read.txt","r");
[Code]...
I also got an error in printing wherein the data in read.txt is "Hello" newline "World" and my program prints world twice.
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Feb 26, 2013
is there anyway to read an entire file and print in on screen? file consists of strings and integers!
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Apr 20, 2014
I know this is how you read from a file. I also want to print my output to the same name of the file plus ".txt". So if my file is called "text" I want to print it to a file called "text.txt".
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
[Code]....
Would it be something like this? Is it better to use "a" or "w" in the fopen? I want to write to it several times.
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
[Code].....
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