C/C++ :: Reading And Printing 2D Array?

Apr 10, 2015

I have a program where I need to read in a 96 number .txt file and perform some operations on it.However, the numbers it reads in are all inncorrect. I got it to work in XCode, but it doesnt work in DevC++ which is where the teacher will be running it. Do I have any major error?

#include <stdio.h>
#include <stdlib.h>
#define rows 8
#define cols 12
void makeArray(FILE*,int[][cols]);
int getScore(int[rows][cols],int,int);

[Code]......

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C/C++ :: Reading File And Printing Stuff

Jun 5, 2014

void readpatient() {
int count = 0;
f = fopen("patient.txt","r");
while(!feof(f)) {
printf("
%d",count++);
p2=new patient();

[Code] .....

Here is what I've tried. I'm trying to read a file aND print stuff in it, but my while loop isn't ending up.. What should i do? It only prints patient name 1 time and after that it prints nothing.

removing system("pause");

results in an endless loop.

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C :: Reading From Stdin And Printing - Segmentation Fault

Mar 8, 2013

I'm writing a program that reads from stdin and prints it back out. I'm getting a bunch of garbage then a seg fault.

Code:

double numbers[256];
memset (numbers, 0, sizeof (numbers));
for (;;) {
double num = scanf ("%255lg", numbers);
if (num== EOF)
break;
}
for (int i = 0; i < (int)sizeof (numbers); ++i) {
printf ("%g
", numbers[i]);
}

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C/C++ :: Reading Strings From A Text File And Printing Them

Feb 26, 2015

I need a program that reads the number of lines of a file and then several (max of 20) lines of text from a .txt file so an example of the .txt file is: 2 This is the first string This is string number 2 So it first reads the 2 and then reads the two lines of text. It stores the text in an array of pointers. The code i have so far is:

#include<stdio.h>
#include<string.h>
#include<ctype.h>
#include<stdlib.h>

[Code].....

It doesnt give me any errors but all it does is keep running and doesnt print anything out kind of like its in an infinite loop although i dont see how that could be possible.

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C/C++ :: Reading Hex Values From File And Printing Them In Decimal

Dec 1, 2013

I am trying to read hex data from a file (not just hex values in text format). I was able to read it (02 EC) with "fread" into an char before but I need to change the Hex value into an integer in decimal.

I already read about strtol but I would prefer reading the hex Value into an integer.

Here is my code so far:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
int itrack1[1];
int itrack2[1];

[Code] ....

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C :: Reading And Printing In A Specific Format Strings Of Characters And Integers

Feb 23, 2015

I have been skimming and searching but dont know how to word the search just right to find what I need to know. I have written simple stuff with the support of tutorials like weight conversion or loops counting up to a set number. Nothing amazing. The other day I found out how to input and print a string rather than a single text character which i though was bad ass. I even got it to read multiple strings on a single line and found a way to read multiple lines. I can even format it to read both integers and characters on the same line as long as I know the predefined format.

On to my question... How do I read multiple lines with both carecters and integers. for instance:

nissan 1996
toyota 1998
or more comples like
nissan gtr 1996
toyota markii 1998

I want to use
int year;
char make[10]; maybe need to use char make[10][10]; for an array i would guess.
char model[10]; optional for the extra data

but reproduce what i read in a different order. say...
1996 nissan
1998 toyota
vice the original format.

this is what I have tried.

Code: scanf("%s %s", &make,&year);

//The way I seen to read multiple lines was on here

scanf("%[^/t]", %make);

But this wont let me separate the two into two differnet definded data types. Let alone use printf to display them in reverse order.

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C++ :: Reading File Then Printing Data Onto Other File

Nov 7, 2014

I am reading a file then printing the data onto the other file. It is working, however when I check to see if each variable is being properly set after reading the file a issue arises.

Example of the file being read

Code:
Vehicle PV50CAN passed camera 1 at 05:33:26.
Vehicle W867BRO passed camera 1 at 05:33:29.
Vehicle KQ63ARU passed camera 1 at 05:33:38.
Vehicle K954ITQ passed camera 1 at 05:33:40.
Vehicle V220MXB passed camera 1 at 05:33:42.

[Code] .....

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C :: Printing Array With A New Value

Nov 21, 2013

I have an array, ary[size+1] and the original values entered and then another value, x, entered. I found the index of x that makes the array nondecreasing order

Code:

void InsertX (int ary[], int size, int x)
{
int i=0;
int j;
int index;
while(ary[i]<x)

[Code]...

But i can't figure out how to print the new array with x in it, using its index

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C :: Printing A Box Using 2D Array

May 8, 2013

how to print a box using 2d arrrays. i have to create a tetris game which a im stuck at this stage... so far i have tired i can only come out with this..my coding done so far is as follows:

Code:

#include <stdio.h>
#define ROW 15
#define COLUMN 15
void disp_box (char b[ROW][COLUMN])
}

[code]....

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C++ :: 3 Dimensional Array Printing?

Oct 25, 2013

I want to make a program that asks the user for a message and then print out a large graphic of that message. For example, if the user types "he" I want to print out

H..................H EEEEEEEEE
H..................H E
H..................H E
H..................H E
HHHHHHHHHH EEEEEEEEE
H..................H E
H..................H E
H..................H E
H..................H EEEEEEEEE

(treat the periods as spaces. I only put them there because it wouldn't separate the H's correctly.)

I will loop this to continue until the user types quit.

1. How would I set this up to store the user input characters into an array?

2. How would I print out the stored data in the shape of the word?

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C++ :: Printing Out Prime From Array

Nov 4, 2013

I am trying to print out prime from array. I have viewed other sources that are similar and tried to use as reference, but only to confuse myself. This is what i have so far.

void get_output(int&Max,int array[]) {
//array[i]-i;
for(i=1;i<=10;i++) // allow 10 outputs on a line. {
for(int i=0;i<Max;i++) {
prime=true;

[Code] ......

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C/C++ :: Printing The Contents Of The Array?

Feb 18, 2014

I am writing a code with C where I will give an integer and get the binary conversion of it.I tried to fill the binary digits into an integer array.But when I normally print it will give the proper output.But when I try to print the contents of the array it will not produce the proper result.

My code would be as follows.

#include <stdio.h>
#include <conio.h>
int main()

[Code]....

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C :: Printing Sum Of Variables From Array Of Structure?

Oct 10, 2014

I have an array of structure that takes family information (name, age, and state) after it takes the users input it prints back all of the information that was input and then prints the family members that just live in Texas. After that I am trying to implement a function to average out the ages of all family members but I cant seem to get it right, whenever it gets to that part of the program it just outputs 0. I also tried adding an & sign prior to FAMILY[i].age and got an error of int from ptr with no cast.

Also I realize that the code only shows adding of the family members ages which is fine for now as I am concentrated on getting that to work in the first place.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//Global Variables
int i=0, a=0, sum=0;

[Code].....

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C :: Printing Duplicates Found In Array?

May 8, 2013

I'm having some trouble printing the duplicates found in an array. Specifically, when the value is at more than 2 positions. So if the value 3 is at position 1, 10, and 11 it'll print three messages instead of two:

value 3 at position 1 is also at position 10
value 3 at position 1 is also at position 11
value 3 at position 10 is also at position 11

instead of

value 3 at position 1 is also at position 10
value 3 at position 1 is also at position 11

This is real simple problem, but I can't seem to figure it out. I've been trying to implement another array to 'remember' the encountered position, but I haven't had any luck.

Code:
for(i = 0; i < num_count; i++){for (j = i + 1; j < num_count; j++) {if (num[i] == num[j]){printf("
value %d at position %d is also at position %d", num[i], i, j);}}}

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C/C++ :: Printing Struct Array After Inputting Information?

Aug 28, 2014

I am doing a data structures program on C++ that is suposse to consist of declaring an array of size five for my credit card structure, that allows the user to input information of five diferent credit cards. I am having a problem with my program, because it runs but after I input the information of the credit card, it does not print out the values that I had input.I dont know where I went wrong with the code or if it is that my approach to solving it is wrong. My code is the following:

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
struct TarjetaCredito

[code].....

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C# :: Printing All Values Above The Diagonal Line In 2D Array

Apr 11, 2014

I need to print all the values in a square 2d array that are above the diagonal line. So if I have this 6x6 array for instance:

{0,0,0,0,0,0},
{1,1,1,1,1,1},
{2,2,2,2,2,2},
{3,3,3,3,3,3},
{4,4,4,4,4,4},
{5,5,5,5,5,5}

I'd have to print the elements in italics. I've tried this:

for (i = 1; i < a.GetLength(0); i++) {
for (j = i-1; j >=0; j--)
Console.Write("{0,-2}", a[i, j]);
Console.WriteLine();
}

with the array mentioned above but for some reason it keeps printing the elements BELOW the line, when I need it to print those above it. I know that for arrays we usually start loops with a value of 0 but seeing as there should be nothing to print at [0,0] I started the loop at 1.

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C/C++ :: 2D Array For Printing Both Diagonal Elements Of Matrix

Jan 31, 2014

what if we want to print both the diagonal elements!!!!

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C/C++ :: Print Array Of Strings Is Printing Null Instead Of Result

Feb 17, 2014

I am trying to print the array of string using this code but the compiler is printing null in the output:

The code is as follows:

char *arr[10];
int i;
for(i=0;i<10;i++)
scanf("%s",*(arr+i));
for(i=0;i<10;i++)
printf("%s
",*(arr+i));

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Visual C++ :: Reading Into Array / 2d Array From Mixed Text File?

Jan 18, 2014

I know to read a strings into array and tables.. what is they are mixed up?? strings are just names ( 3 characters) and there are bunch of table.. the max size was set to 60

ex. text file

JES
DAN
JEN
.
.
.
01010101
10010101
RAM
JET
01010010
10100101
.... and so on

should i use a while loop?

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C/C++ :: Reading A File Into Array Then Reversing The Array

Jan 19, 2015

This is what I am supposed to be doing with this problem: Read the integer values in the file "numbers.dat" and display

* them in reverse order (that is, display the last number in the
* file first, the second-to-last second and so on). Use an array to
* store the values. It is safe to assume that the file contains no
* more than 100 values.

I have gotten far enough to read the file and display as an array, but it is displaying vertically rather than horizontally. So it is displaying 10 and a 1 on the first line then the 0 on the second line. Before I can work the reverse part out, I need it to display each number as 10 line 1 -235 line 2 so on and so forth.

This is my code so far:

void display_array_reversed() {
ifstream fin ("numbers.dat");
if (!fin){
cerr << "Error opening file" << endl;
exit(1);

[Code] .....

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C :: Reading PPM Image Into 1D Or 2D Array

Apr 4, 2013

I have an assignment where I need to take an assigned image, rotate it 90 degrees to the right, flip it upside down, and turn it to grayscale; each with different outputs.

I was thinking if I can read in the image into a 2d array //array[height][width] or even just an array with the values of each pixel (r, g, b), I can just modify the array and spit it out when done.

if i can just get it into the array, I think I'll be fine. We've done similar assignments with modifying arrays for grayscale images and the other two I can probably figure out. But how am I going to read in each pixel into an array with three different values in each slot? This is my code so far:

Code:
#include<stdio.h>

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C :: Reading From A File And 2D Array?

Apr 25, 2013

So if I have a file that has a list of scores and the name of the student, how am I going to read the scores and names, and print to output? For example, the text file will look like:

83 75 89 90 75 67 John Doe
67 92 78 64 88 95 Jane Waters
76 65 87 70 97 76 Billy Bob

And they'll be printed like that too.

I made a 2D array for the scores and names, and was able to scan the scores into the scoreArray, but I am stuck for the names. Do I use fscanf, fgets, etc? And how do I use these for a char array?

insert Code:
int main {
int scoreArray[NUM_ROW][NUM_COLUMN];
char nameArray[NUM_ROW][SIZE];
...........opened file, etc.

[ for (row=0; row<2; row++)
{ if(row>0)
{printf("

[Code] ....

When I run this, I get the scores and names (somewhat) in a jumbled mess.....

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C++ :: Reading In TXT File To 2D Array?

Mar 27, 2013

My assignment is to read in from a .txt file two things: an integer and a string. After reading in these 2 items I have to put them into a 10x10 2D array so that both the number and the character can be manipulated by the user. Here are the contents of the text file:

Dr. J's Garden
0.21,B, 2.80,G, 4.96,B, 2.66,B, 4.48,B, 0.61,T, 0.40,B, 3.50,G, 3.63,B, 3.91,T,
2.33,T, 4.51,G, 1.15,G, 4.95,T, 2.76,T, 4.51,T, 2.54,G, 4.04,T, 2.38,B, 0.62,B,
4.54,G, 3.38,T, 1.57,T, 3.92,T, 3.03,B, 4.72,G, 0.23,B, 4.02,G, 4.69,G, 0.66,G,
1.34,T, 2.21,G, 2.48,G, 4.85,T, 3.25,G, 3.55,G, 4.78,B, 0.81,G, 0.74,G, 2.55,G,
3.35,G, 4.52,G, 4.81,G, 2.67,G, 4.97,B, 0.87,G, 1.28,G, 4.58,B, 1.91,B, 3.69,B,
3.02,T, 3.15,T, 1.08,T, 4.68,G, 1.10,B, 3.17,G, 1.97,T, 0.99,G, 4.50,T, 3.87,T,
3.36,G, 1.60,T, 3.73,G, 2.14,B, 3.68,B, 2.44,G, 3.10,G, 4.54,B, 0.25,B, 0.25,G,
1.79,B, 3.02,G, 2.21,T, 0.22,G, 3.67,B, 4.46,G, 2.14,G, 2.31,G, 0.80,T, 3.83,B,
1.56,B, 1.41,T, 0.80,G, 1.27,T, 0.08,B, 1.20,G, 2.88,B, 2.78,T, 3.30,B, 1.75,B,
2.60,G, 4.72,T, 4.55,T, 0.89,B, 0.52,B, 2.06,T, 0.28,G, 4.36,T, 4.41,G, 0.36,B,

One number and one character need to be assigned to each element of the array. I know exactly how to fill a 2D array when it's just numbers, but the characters and the commas are giving me a lot of trouble.

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C++ :: Reading File Into Array?

May 10, 2012

i'm reading a file which has 20 rows and random number of columns, i want to put them in array/vector which i did but the problem is that array is filling a cell with a garbage value at location where i don't have a value in the data file.

suppose i have data file like following (there is tab between each column and each row has different number of columns)

Code:
20 30 10
22 10 9 3 40
60 4
30 200 90
33 320 22
here is my code

Code:
#include <vector>
#include <iostream>
#include <fstream>

[Code]....

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C++ :: Reading A File Into Array Of Struct

Nov 20, 2014

Code:
#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
struct inventory

[Code]...

This is my program output Enter the file name : "filename".txt ..... (Nothing shows up)

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C :: Reading A File Into Array Of Pointers?

Mar 24, 2013

why when I print out "array[2]" nothing prints? It just prints blank space. My file definitely has text in it, but when I try to assign "text" into the array of pointers it won't show any text. I know fgets() appends a newline at the end of the string, not sure if that has anything to do with it, but I've tried printing everything that should be in "array" with a for loop and I get nothing.

Code:
#include <stdio.h>
#define FILEPATH "/home/user/Desktop/text"
int main(){
FILE *myFile = fopen(FILEPATH, "r");
if(myFile == NULL) return 0;
char text[100];
char *array[100];
int idx = 0;
while(fgets(text, 100, myFile)){
array[idx++] = text;
}
puts(array[2]);
}

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