I am attempting to read in a file that has 4128 sets of 21 numbers separated by commas and write it into an array. I now know that in order to use fseek, I have to make my array a character array, but I need my function to read in decimals (ex: 0.172635). I'm reading in
My code is working all except one part I'm just completely stuck on and it's probably something simple. There are 14 numbers in the file. The way I have the code now it will tell me there are 14 which is correct but it displays my low number as 0 and it should be 6. If I change if(infile) to if(infile >> num) it will read the correct low number as 6 except now it says there's only 13 numbers and it's not reading the first number in the file which is 23 so it skews the whole program.
#include <iostream> #include <fstream> /*This program pulls numbers from a file and displays various information such as the sum of the numbers, average, highest and lowest. */ using namespace std; int main() { ifstream inFile;//Declare the variables including the input file stream.
The program runs fine but i just want it to read the inputs from a text file rather than user manually entering it! what changes should i make in the codes..
I think it comes from having to align the data in the output file. How to start this is to use a function to read in all the characters using a while loop. Then read in all the digits in a separate function. When it comes to outputting the data in the correct format I'm lost, so for now if I could figure out the functions that would be awesome. A final note we have not gotten to using strings so the I'm trying to use getc, fgetc, and ungetc.
Write a program to compute average grades for a course. The course records are in a single file and are organized according to the following format: Each line contains a students first name, then one space, then the students last name, then one space, then some number of quiz scores that, if they exist, are separated by one space. Each student will have zero to ten scores, and each score is an integer not greater than 100. Your program will read data from this file and write its output to a second file. The data in the output file will be the same as the data in the input file except that there will be one additional number at the end of each line: the average of the students ten quiz scores.
The output file must be formatted such that first and last names appear together in a left justified column that is 20 characters wide. Each quiz score should be listed in a right justified column that is 4 characters wide, and the average should appear in its own right justified column that is 10 characters wide.
Note that if a student has fewer than 10 scores, the average is still the sum of the quiz scores divided by 10; these students are assumed to have missed one or more of the quizzes. The output file should contain a line (or lines) at the beginning of the file providing appropriate column headings. Use formatting statements to make the layout clean and easy to read.
I need to open a file that has multiple lines that look something like this, " black box 100.01 33.5 78.93". What this shows is the coordinates of the black box. Lines will have different objects with different coordinates. I need to create a loop that will read this file and tell me when a black box is found by displaying a message. I don't need to know how to create this file. I don't need to display the entire file but rather have it search for black boxes.
I am reading certain int's at a time from one int number stored in a file. I'll explain. I am working on an ezpass project and basically I have to store an int in a file, and from that file, write a program that separates numbers into information.
For example:
the number 204601324 is stored in a file. I know how to open a file from terminal, but the issue is reading the individual numbers. The first number is weight class (2). My program has to display that number as the Variable "weightClass." how do I get it to do that? In addition, miles allowed is the number "0460." How do I get that number to display as the variable "oMiles?"
I am trying to read numbers stored in a txt file to populate an integer array. The problem is that the numbers read from a file have to be treated as strings and then I am not able to put them in an integer array.
I tried the stoi function to convert the string in 'box' into an integer but I am getting an error.
Code: #include <iostream> #include <stdlib.h> #include <fstream> #include <string> using namespace std; int main() { int amount=10; int k[amount];
I'm having issues reading to a 2d array from a file. When I try to read the data from my file into my matrix variable it simply doesn't read anything and leaves the variable unmodified. I've tried just reading the first piece of data in the main function and it doesn't work there either. I'm really perplexed at this point since I've never had an issue reading from a file before. Here's my relevant code:
Code: int main(int argc, char** argv) { double matrix[MINSIZE][MINSIZE]={0}, vectors[MAXSIZE][MINSIZE], ans[MAXSIZE][MINSIZE]; FILE * inFile; inFile = fopen(FILENAME,"r"); if(inFile==NULL){ printf("File does not exist.
And all of the above information is one person. As is "John,Peter,23" is first name, last name, age. When there are multiple people in a csv file how can i parse through and separate the information in a string and int for later use?
I can't get my program to read the rest of my variables from my data file it will only read the first two and my end of file won't work it keeps continuing on.
879.46 C 400.00 D 100.0 F 525.00 C 450.00 D 500.00 D 1000.00 C 2000.00 D 3000.00 D 3500.00 C 5500.00 C 500.00 B 200.00 C -235.00 D 250.00 H -500.00 D 500.00 E
That's my data it will only read the inital number and C and D but nothing else.
// develop algorithm to balance checking account make transactions
#include<iostream> // required for keyboard and screen I/O #include<fstream> // required for external file stream #include<iomanip> #include<conio.h> #include<string>
I have been experimenting with a program that loads WAV file and tries to read 1s and 0s from audio file (binary coded information). So far I got working code, but the problem is that I'm not getting correct data. I do get somewhat similar data. The problem is that I get data that amplifies low amplitudes, so instead some noise and binary data I get lots of noise and hard to recognize binary data. My code is this
#include <stdio.h> #include <iostream> #include <math.h> using namespace std; // An unsigned char can store 1 Bytes (8bits) of data (0-255)
You can see it's not the same. I do get the same data like I do from binary viewer, but I don't understand how they are translated to amplitude value. ? Where is the catch?
So this is not really question about c++, but about wav file structure and reading data.
I've got a problem with reading my file data but before I explain it I'll give some background. I'm programming a 2D Platformer using the SDL library for rendering.
My problem is that when reading in the data from the file it ignores all the data and just skips to the end of the function, I've attempted to debug it and the load function is getting called, the file is in the right directory and is being opened.
I'm not sure if it's the way I'm using multimaps. I should have mentioned that I put a break point in the multimap loops where it writes and inserts the objects and it doesn't seem to be hitting the functions, this is why I think there's something wrong with the multimaps.
read some information from a text file. The program I'm working on is like a simple betting program.
What I need to read are:
match_code - team1 - team2 - odd1 - odd0 - odd2 139 Atletico Madrid - Real Madrid 2.853.40 2.35
But the spaces between datas are not known. We only know that both team names may contain more than one word and there is one space, exactly one dash and one more space (" – ") between team names.
Also match_code is an int and odds are double values.
I need debugging the code provided below, which reads data from a file and puts it into several vectors.
Something very strange happens: if I try to read the file up to the last line, I get an runtime error, while if I try to read the file up to the second last line, I do not get the error.
However, if I try to read the file up to the last line, it READS IT CORRECTLY, as you can see that it prints out the right values.
Following there is the code and the file that I am trying to read.
I'm not sure why my program isn't reading data from the dat file. I'm not sure if it's because I messed up my pointers, or I'm missing something. I know we usually use Infile >> blah >> blah >> blah; to get the data from the file, but my instructor showed an example that had the struct read it for you in this format and I could just call it with pointers.
#include <iostream> #include <iomanip> #include <fstream> #include <assert.h> using namespace std; using namespace System; typedef int Integer;
I have a multivalued function (created in some other software Mathematica) that looks like f[8.7,5.4]=4.8+8.7*I. In other words it's a complex valued function of two variables. I store the output of this function over a range of parameters in a text file that looks like:
Code:
f[1,2]=9.8+8.7I; f[4,5]=5.6-5.21I; . .
I could store it differently if that is easier, but essentially I just want some c++ code to read this in and store it, either in a vector type structure or Dictionary? (I don't think a double array will work as I don't know how long list of data is in advance).
And so on ... it could be up to any alphabet. The number of As and Bs and Cs and Ds in first column depends on the number of unique alphabets used in the first column. For example the unique alphabets used in this case are 2 (A,C) hence each alphabet appears in the first column of consecutive 2 rows.
Which means
Code: A:A,B,C,D B:B,C,D,E C:C,D,E,F D:D, ,F,G (E is missing)
Actual Data A,1 A,2 A,3 A,4 C,18 C,33
Final Solution: Add each integer value to its previous value and store the resulting value.
I am working on a project for school that has us read in a text file that contains 8 lines of SSN and grades. I am not sure how to go about reading in the lines and differentiate between the SSN and grades in the calculations.