I am trying to extract the numbers from Numbers.txt, and then put them in the correct file, either Odd.txt or Even.txt, depending on what they are. And I have gotten to a point where I am not sure what to do; right now it just reads Numbers.txt and then the program ends.
#include <iostream>
#include <fstream>
#include <string>
[Code].....
i have to read a file with between 5 and 10 pairs of numbers, each on a different line. i can read the file, and wrote something to save the length of the file as a variable, but when i use it i start returning crazy data. the problem is in the do while loop and i want to change the i< in the for loop to "lines" so the code stops when the last digit is read. if i use i<10 the file has extra digits is the file is only 8 or 5 pairs of numbers.
FILE *Fpointout;
FILE *Fpointin = fopen ("test.txt","r"); //read this one
Fpointout = fopen ("out.txt","w"); //write this one
if (Fpointin == NULL) //if no file in source {
printf ("File does not exist."); //tell user it is not there
[Code] .....
I have to make a program to read a file with strings and determine if they are palindromes. The problem is that the program says that they're all palindromes.
int main() {
ifstream inFile;
ofstream outFile;
inFile.open("in.data");
outFile.open("out.data");
if (!inFile || !outFile) //to display error if input files are invalid
[code]....
I am trying to write a function that determine if a file in a directory is of a gif/bmp/png/jpg extension. Right now I think I have correctly written my code all the way up to listing the files in the directory and opening them in binary mode.
Now, I am struggling with figuring out how to determine what extension the image is. Right now i am just focusing on writing my "bool isGif();" function... To determine if a file is a .gif extension using binary, the first 6 bytes of the file will contain either GIF87a or GIF89a.So, to do this I would read the first six bytes of the file using the function below, correct?
fin.read((char *) &a_file, 6)
Then, once I read in the first six bytes how would I conditionally compare it to determine if it is a .gif? Would I just use
if(fin == "GIF87a II GIF89a) {
\do something here
}
Because that doesn't seem to be working...
determining if a value entered in loop is an odd or even number. Also, the value can't be int because it may be a decimal value(therefore i cant use the if(x%==0).
I need to replace the if(value%2 ==0) else num_even++ statement in my code with something else that will work with float to determine odd vs even.
#include <iostream>
using namespace std;
int main() {
int num_values;
float sum_values = 0;
int num_neg_values = 0;
int num_pos_values = 0;
[code]....
I need function to determine where to place new element in sorted array. I want to use binary search to find index where element should be placed, when push all others.
Prototype should be something like
int WhereToPlaceElement(ElementType hash); // uses private atribute ElType** elements
I have tried my best to write, but all tries ended in inf loops and reading invalid locations of array.
char A[]={}; this is the array in c++ of unknown size, now I want to enter some alphabets via loop and want to be the no. of elements i entered the size of the array. .
View 8 Replies View RelatedI am new at c++ and I am trying to write a code to determine the maximum deflection at the end of a cantilevered beam. I am given the formula : deflection= (4 W L^3)/(E B H^3) where W is the load weight, L is the beams length, E is the modulus of elasticity, B is the beams base, and H is the beams height.
// Included Header Files
#include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
#include <fstream>
#include <cstdlib>
#include <cstdio>
[code]....
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] ....
im supposed to create a program that reads in a list of integers from the terminal and writes the negative numbers to one file and the positive numbers to another file.
i got most of it doen but for some reason its not writting the negative numbers. on what im doing wrong?
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main(){
int pos_num = 0;
int neg_num = 0;
int positive_numbers = pos_num % 5;
[Code]...
I'm new to programming and I have a question about scanning numbers from a .txt file into a .c file. I have an array that has 50 integers and I want to read in 50 numbers from a .txt file. What would I type in on the command line to get the array to read in the .txt numbers?
View 1 Replies View RelatedMy question is to write a complete program that will search a file of numbers(numbers.txt) for the smallest and largest numbers and then write the values to the screen using a single pass through the file. File only contains type int and holds at least one int. My questions are am I reading in the first number correctly? Where would I read in the second number to compare to the current max and min?
Code:
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char * argv[])
{
FILE *fin;
fin = fopen("numbers.txt", "r");
//check to make sure file opened
if(fin == NULL)
}
[code]...
suppose you we given a file containing sorted numbers
ie
1
2
4
6
7
9
10
12
14
and you needed to inset the number 11 into the file and keep it sorted.
I have been working on this program for days now and for some reason my program will not write to my third file. It will call all of the integers that I need it to call but it will not write them out to a file. How to use my loop correctly.
#include <iostream>
#include <fstream>
using namespace std;
int file1();
int file2();
int file3(int);
[Code] ....
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.
[code]....
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
int num;
int count = 0;
[code]...
The last number in the numbers.txt file is: -1, and I am not allowed to include it in the calculation of total, average, etc.
I tried to make an if statement to not include -1 but, I can't figure it out. This compiles with or without my num == -1 statement.
I want to input only 4(numbers)from a .txt file like Number of Plants: 4 Now where I have to change for this.
#include<iostream>
#include<fstream>
using namespace std;
int main (void) {
ifstream inputFile;
inputFile.open("flp.txt");
if(inputFile.is_open())
[Code]...
The program is to generate random numbers to a file and will have one integer parameter, Open a file and then using a loop write the required number of random numbers to the file. Scale the random numbers from 1 and 100 inclusive. Then closes the file .The last function will read the numbers in the file into your program. so far i have
Code: #include <iostream>
#include <string>
#include <iomanip>
#include <ctime>
#include <fstream>
#include <cstdlib>
[Code] .....
This is supposed to read a series of 16 bit binary numbers as short ints in the array memory. However, it only appears to be reading the first number.
Code:
short int memory[256];
void readFile(){
//read input file into int memory[]
FILE *ifp;
ifp = fopen("proj1a.dat", "r"); //input file
[Code] ....
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..
Code:
#include<iostream.h>
#include<stdio.h>
#include<conio.h>
#include<math.h>
float friction,flow;
[Code] ....
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 have a file with numbers and want to display it on the screen.
View 15 Replies View RelatedI 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.
View 3 Replies View RelatedI am trying to write a C program to take numbers from an input file (input.dat), calculate the sum and average of the numbers for each row, and display them in a form of table and in an output file (result.out).
Using these numbers in the input file.
-0.043200 -0.003471 0.000000
-0.040326 -0.004851 -0.000737
-0.018204 -0.004246 -0.001530
0.022249 0.008891 0.004870
0.074892 0.044237 0.032171
0.129600 0.100233 0.089016
0.174747 0.160100 0.161792
0.200242 0.199106 0.214417
0.174747 0.160100 0.161792
i have created the the file but i keep getting errors in the underlined area after the while!!!
#include <stdio.h>
int
main(void)
{
[Code].....
I wanted to know if it is possible to read binary numbers(0's and 1's) from a file(text,picture, anything), and see them in the compiler.
View 14 Replies View RelatedI 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?"
