C :: Return Errno From Open Function And Print It To Screen

Mar 22, 2013

i am programming Cli/Ser ,so part of the program is to open file to download it from client side,but i want to return the global value Errorno to print it to screen , and how to use strerror() func ??? i write this "This is part of server code" :

Code:

fd= open("abc.txt",O_RDONLY);
//error handilng in open file
if(fd<0)
{

[Code].....

View 3 Replies


ADVERTISEMENT

C/C++ :: Passing Two Dimensional Array To Function And Print To Screen?

Apr 4, 2015

This seems simple enough but I'm missing something here to make this code work.What I'm trying to do is print the contents of the two dimensional array in 25 rows and 4 columns. I experimented with something similar to this code when I initialized the array with numbers.

#include <iostream>
#include <iomanip>
#include <cmath>

[Code].....

View 1 Replies View Related

C/C++ :: Passing Two Dimensional Array To Function And Print To Screen

Apr 4, 2015

I'm getting garbage. I tried including the name of the array in the cin object but I got an error message that says "no match for operator '>>'. When I take the name of the array out, the program compiles but I get garbage. Program is suppose to reads data from a file of 25 students and calculates test scores and class grade average output each student's name score, letter grade and grade average. I would be happy at this point if I could just print out something that wasn't garbage.

Here is the code.

#include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
#include <fstream>
using namespace std;
//const
const int Array_Row = 25;
const int Array_Col = 4;

[Code] ......

View 1 Replies View Related

C++ :: Return Struct Pointer From A Void Function And Print

Mar 17, 2013

i need to return a struct pointer dynamically allocated inside a function call void function() which is done using 'out parameters' in following code

struct my_struct {
int x;
} void my_function( my_struct** result ) {
my_struct* x = new my_struct{ 10 };
//...
*result = x;
}

Now i have a doubt, so if i want to print the return value from struct pointer, should i need to print it in the void function() or in the caller the function...

View 3 Replies View Related

C++ :: What Is The Command To Return The Position Of The Mouse On Screen

Sep 27, 2013

What is the command to return the position of the mouse on screen in C?

View 8 Replies View Related

C# :: Return Message When Fail To Open Database

Oct 3, 2014

I dont know how return message when user fail to open Database.

I building this class to manage db

The "open" method return an OleDbConnection type to manage it later

On catch zone I cant return string , int or other types

class ApriDB {
//Stato interno
string connessione = "";
// metodi
public ApriDB() { } // Costruttore di default
public OleDbConnection open (string connessione) {
OleDbConnection conn = new OleDbConnection(connessione);

[code].....

View 3 Replies View Related

C :: How To Get Sum Of Areas And Print On Screen

Mar 19, 2014

So i am struggling for days to get this done and all i need is to get the sum of the areas and get them printed on the screen my code is this:

Code:

#include<stdio.h>
#include <stdlib.h>
#include<conio.h> //Not needed in Dev C++//
#define PI 3.1415
float Area_of_Rectangular(float length,float width);
float Area_of_Circle(float radius);
int main()

[Code]...

View 7 Replies View Related

C :: Print The Inverse Number On Screen

Dec 25, 2014

Print the inverse number. Ex: 2178*4=8712

Write down a program which can satisfy the prerequisite and print out the screen.

The answer is:

Code:
void inverse2 ()
{
int i,j;
for (i=1000;i<=9999;i++)
for (j=1;j<=9;j++)
if (i*j==inverse (i))
printf("%5d%2d",i,j);
}

I can't understand the double for loop.

for (i=1000;i<=9999;i++)
for (j=1;j<=9;j++)

And The meaning for

i*j==inverse (i)

View 2 Replies View Related

C :: Printf Doesn't Print On Screen

May 23, 2013

This code runs. However, when I run it, the text from printf doesn't appear until after I type in the two numbers.

I use Wascana, will it run correctly on other compilers?

Code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main() {
fflush(stdout);

[Code].....

And this is how it turns out on the screen:

Code:

6
3

What size is the die:

how many dice to roll:

Numbers are 3d6
Rolling die no.1...
RolledDie: 4 DieTotal: 4
Rolling die no.2...
RolledDie: 5 DieTotal: 9
Rolling die no.3...
RolledDie: 5 DieTotal: 14

The total is: 14

View 4 Replies View Related

C++ :: Recursion - How To Print To The Screen Value Of N After It Has Been Multiplied

Mar 20, 2013

How to print to the screen the value of n after it has been multiplied.

For example: if I use cout << "n: " << n << " power: " << power << "
"; I

can see the variable "power" decrementing by 1, but I don't see the variable "n" incrementing with its new value after it has been multiplied by n * n.

#include <iostream>
using namespace std;
typedef unsigned short int USHORT;
typedef unsigned long int ULONG;

ULONG Getpower(USHORT n, USHORT power);

[Code] .....

View 2 Replies View Related

C++ :: Check If A Number Is Odd Or Even And Print It To The Screen

Mar 8, 2013

My objective is to check to see if a number is odd or even and print it to the screen just to make sure its working correctly.

The data file contains:
138
402 2 485
9
43
98 805
58
421
948 7 97
48
67
35
42
948
579 39 12
700 20 500 210
98

I can get the numbers to print fine using:

fstream infile1(argv[1]);
if(!infile1.is_open())
cout << "Could not open file";
else {
char listNum;
while(infile1.get(listNum))
cout << listNum;
}

However, when I check for odd or even numbers it will check each and every number.

printed like this (partial list):
1 is odd 3 is odd 8 is even
9 is odd

But it should print:
138 is even
9 is odd

I tried using getline, but it keeps giving me the errors:
invalid conversion from 'void*' to 'char**'
invalid conversion from 'char' to 'size_t*'
too few arguments to function 'ssize_t getline(char**, size_t*, FILE*)'

Here is the getline code, what am I doing wrong? I have tried switching things around, adding things. Just nothing works.

ifstream infile1(argv[1]);
if(!infile1.is_open())
cout << "Could not open file";
else {
char listNum;
getline(infile1, listNum);
cout << listNum;
}

View 2 Replies View Related

C++ :: Store And Print String On Screen

Sep 20, 2013

Given this sentence as an input: "Hello my name and "John" (with its spaces and capital letters), print it on the screen .. NB the phrase must be entered from the keyboard all at once ... you can do this in C / C + +?

View 3 Replies View Related

C/C++ :: How To Print Results On Screen Without Using Printf

Jun 26, 2013

how to print the result on screen without using printf in C...?

View 6 Replies View Related

C++ :: Make Output Print Out To Screen In Reverse?

May 26, 2013

How can I make the output print out to the screen in reverse?

Code: #include <iostream>
#include <iomanip>
using namespace std;
int getnum();
void Fibonacci(int n);

[Code].....

View 7 Replies View Related

C :: Program To Print All Of Prime Numbers To Screen

May 29, 2013

I'm trying to write a program that prints all of the prime numbers to the screen. I'm getting angry because it only prints EVERY number. I think it has something to do with the bool change not being able to leave the for-loop but how to fix it.

Code:
#import <stdio.h>
#include <stdbool.h>
int main(void){
printf("
The Primes Are: 1");

[Code] ....

View 3 Replies View Related

C :: Any Way To Read Entire File And Print It On Screen

Feb 26, 2013

is there anyway to read an entire file and print in on screen? file consists of strings and integers!

View 7 Replies View Related

Visual C++ :: How To Print Mathematical Series On Screen

Nov 24, 2013

How do I print a mathematical series such as

1 + 2/2! - 3/3! + ...... n/n! //n is read from user

Not only we need to print the series on the screen but at the same time find the sum using simple loops.

View 1 Replies View Related

C :: Program Won't Correctly Print Proper Totals On Screen

Oct 10, 2014

Why this program won't correctly print the proper totals on screen? See my code and the included screenshot.

Code:
#include <stdio.h>
int main(void) {
int total, first, second;
printf("Enter 2 numbers:

[Code] .....

View 4 Replies View Related

C++ :: Search By Word In Text File And Print Out Whole Line On Screen

Apr 7, 2013

I have a text file where in each line is 3 words and 2 int type numbers. I'm doing search by word and I want to print out to the screen the whole line where that word was found (the words is repeated in some lines). My search looks like this:

Code:
#include<iostream>
#include<string>
#include<fstream>
#include<stdlib.h>
#include <vector>
using namespace std;
int main(){
vector <string> words;
string str, paieska;

[Code] .....

How to print line(s) where I found that word?

View 9 Replies View Related

C++ :: Print Custom Area Of Screen - Save As Image File

Sep 9, 2014

I am trying to automatically(periodically) print screen a custom area of the screen, save it as an image file (the image will have the same format always), and then use OCR to get the text in the image as usable string variables. Is this doable? I was looking into tesseract OCR but I find it a bit unclear.

View 10 Replies View Related

C++ :: Convert List Of Binary Numbers From A File Into Decimal And Print To Screen

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....

View 4 Replies View Related

C/C++ :: Program That Read A Number From Keyboard And Print Separated Digits To Screen

Feb 18, 2015

Basically this is what i need to do. Write a program that reads a number from the keyboard, separates it into its individual digits and prints the digits to screen, each on its own line followed by the same number of stars as itself.

For example, if the number is 2339 the program should print

9 *********
3 ***
3 ***
2 **

So far i have managed to separate the number and have them on different lines, but how to implement the stars onto each line with the number!

My code so far:

int main() {
int n;
printf("number? ");
scanf("%d", &n);
while (n > 0) {
printf("
%d

[Code]...

View 4 Replies View Related

C++ :: Open A Text File Then Read Data And Print It Back?

Nov 5, 2013

I am in an "intro" C++ course and am having trouble with a section of my current project.

We are required to open a text file, read the data from that file, and print it back.

However, we are supposed to let the user input the name of the file that is to be opened. This is the code I have so far. It is not opening anything.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
const int NUM_QUESTIONS = 30;
typedef char CharArray[NUM_QUESTIONS];
string fileName;

[Code]...

View 2 Replies View Related

C :: Will Return Root Statement At End Ever Return Value Other Than Value Passed To Function?

Mar 29, 2013

I'm writing some functions pertaining to binary trees. I've used recursion once before while learning quicksort but am still quite new and unfamiliar with it. And this is my first time touching a binary tree. So my question: In my addnode function, will the return root statement at the end ever return a value other than the value passed to the function?

Code:

#include <stdlib.h>
struct tnode
{
int data;
struct tnode * left;
struct tnode * right;
}

[code]....

View 4 Replies View Related

C++ :: Absolute Path Reference - Open File And Print Contents To Terminal Window

May 12, 2014

I am trying to open a file and print the contents of the file to the terminal window. It works when I put the file right in the directory with the Solution but not if the file is out on my desktop and I use the full path. Here is the code:

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int OpenFile(){
fstream SampleFile;

[Code] .....

View 5 Replies View Related

C/C++ :: How To Print New Line Without Carriage Return

Jul 28, 2014

I am using C++ to write data into a (.ini)file. However, when I try to print the value '0A' I am getting '0D 0A'. (this is what I see when I copy the output to HexEdit). From what I can figure out, '0A' is the ascii for 'new line' so write function automatically adds the '0D' which is 'carriage return'. What I want is to print 0A alone. how can I do this?

Note: Windows it is working fine, but linux it is not working...

unsigned char arrRes[4];
int N = 10;
memcpy(arrRes,&N,4);
std::ofstream Output(LUT_OUTPUT_FILE_BINARY,std::ios_base::binary | std::ios_base::out);
Output.write((const char*)arrRes, 4);

here 10 means 0x0a but it is printing 0d,0a...

View 5 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved