C :: Creating Simple Address Book Struct - For Loop?

May 11, 2014

My address book will be simple, and the thing's that I'm expecting to use in it are :

Pointers, Linked Lists
Malloc
Structs
Typedefs
Makefile, header file
Putting functions into different program files

I have started the program trying to create a struct, and getting it working with a couple of entries before going onto user input and splitting it up.

Code:

#include <stdio.h>
#include <stdlib.h>
int main(void) {
// Struct type address book. Just a name, a number and a pointer

[Code] .....

I'm a bit lost at this point... My knee jerk thought is to create a for loop, and cycle through the list.

I'm not sure how this would apply to this though? Without using the familiar type of print loop such as :

Code:
for (i = 0; ;i++) {
printf("%i
", array[i];
}

I'm thinking that I need to create a temporary struct that can be used to assign the value of the next struct in the list, and then somehow print from that....

I'll try and write the logic out :

while temp != NULL (The last node value is assigned NULL to show us where the end of the list is)

create a temporary pointer that can be used to keep track of where we are in the list.

print out the current entry name and number

then assign the temp pointer value to the * next of the current struct. So if we are in entry1 the *next should be the address of entry 2.

Print out entry 2 name and number, assign entry 2 next to the temp value.

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C++ :: Address Book - Add / View Entries

Sep 3, 2014

This program is an address book where you caan add/view entries. I'm having a problem printing out entries. Why the information isn't getting saved into the structure array?

Code:
#include <iostream>
#include <string>
using namespace std;
struct contactinfo

[Code] .....

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Feb 19, 2014

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Jul 13, 2013

I have to write a code which would determine either a URL address is correct or not.

Now, a valid address should look like: "www.something.something.uk".

It has to have 3 dots, 3 w-s in the beginning, and it must end with "uk".

E.g.

Valid addresses:
1. www.jce.ac.uk
2. www.tr2213.oi34.uk

Invalid addresses:
1. www2.jce.ac.uk
2. òæøéàìé - îëììä à÷ãîéú ìäðãñä éøåùìéí - ìéîåãé äðãñä ìúåàø øàùåï
3. www.something.uk

Just to be clear, this criteria mentioned above is not real, just homework

Code:
#include <iostream>
#include <string.h>
using namespace std;
int isValid (char s[])
{
int dots=0;

[Code] ......

It tells me both strings are incorrect but the first 1 is.

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#include <iostream>
#include <string>
using namespace std;
struct studentType{
string firstname;
string lastname;
double gpa;

[code].....

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May 14, 2012

I am doing a piece of gui code on some embedded system.

I'm trying to find a way of eliminating the local variable kEvent:

Code:
EVENT kEvent;
....

Code:
kEvent = EVENT_UPSTREAM;
xStatus = xQueueSendToBack(getEventProcessorQueue(),&kEvent, 0 );
....

I tried this, it doesn't work:

Code:
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Shouldn't this work?

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May 10, 2014

I need to take info in the following format (no blank/skipped lines):

last name, first name street address city, state zip code

And dynamically allocate space for it. I need to use structs, and I need to use an array of pointers to structs to point to them. I know I probably have quite a few problems with my code, but so far, I am able to store and print back the data without issue. In the following code, I only make the loop run 3 times just so I can test it with manual input into the console, but eventually the max will be 50, or until end of input (will be doing IO redirection with a txt file).

Like I said, I can store and print the data fine, but am getting a segmentation fault when trying to sort the info.

Code:
#include <stdio.h>#include <stdlib.h>
#include <string.h>
struct addressBook{
char name [50];
char streetAddress [50];

[Code] ....

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Feb 21, 2014

I am new to C programming, I have been given an assignment to create a simple calculator by splitting the program in 3 files. It should have 2 .c files and 1 .h... I went through the internet extensively and could only come up with this.

main.c:

Code:

//Calculator main.c
#include <stdio.h>
#include <conio.h>
#include "Functions.h"
int main() {
float x = 0, y = 0;
int operation;

[Code]...

Functions.c

Code:

#include "Functions.h"
extern float x, y;
float addition (float a, float b) {
return a + b;

[Code]...

Functions.h

Code:

#ifndef FUNCTIONS_H_INCLUDED
#define FUNCTIONS_H_INCLUDED
float Sum(float a, float b);
float difference (float a, float b);
float remainder (float a, float b);
float product (float a, float b);
#endif

When I do a 'cl main.c' on the Developer Command window for VS2013, i get an error that reads :

main.obj
main.obj : error LNK2019: unresolved external symbol _difference referenced in function _main
main.obj : error LNK2019: unresolved external symbol _product referenced in function _main
main.obj : error LNK2019: unresolved external symbol _addition referenced in function _main
main.exe : fatal error LNK1120: 3 unresolved externals

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3. Write a program that reads a sequence of positive integers and prints out their sum, except that if the same number occurs several times consecutively, ignore all but the first. Assume an input of 0 marks the end of the input. For example, if the input is 3 8 5 5 4 9 1 1 1 1 8 0 then you should print 38 (i.e., ignore one of the 5's and three of the 1's).

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3 write a function called find_largest which has two parameter (one of type struct complex const * and the other type int) and a return type of struc complex . the two parameter represent an array of complex numbers and number of elements in that array . the function should return elements from array which has largest magnitude . this fucntion must called the magnitude function . ( 5 marks)

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Code:

#include<stdio.h>
struct complex {
double real;
double imag;

[code]....

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I know for while loops you type

while(argument){
do whatever
}

you have to use the brackets to enclose just like I used in my code right here.It is a simple while loop that is a countdown.

#include <iostream>
using namespace std;
int main() {
int n =10;
while(n>0){
cout << n << ", ";

[code].....

when I take the brackets away from my while loop, my code will still execute but it just prints out the number "10" repeatedly. I was just wondering why it does this and why the compiler does not throw out an error when I leave off the brackets after the "while()".

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Code:

# include <stdio.h>
int main()
{
int num1, num2;
char op;
int finished = 0;
}

[code]....

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#include "stdafx.h"
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using namespace std;
struct Date {
int day;
int month;
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[code]....

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Here's what I have so far:

Code:
{
//This program calculates a golfers handicap.
#include <iostream>
#include <string>
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[Code] ....

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{
n = n + 0.1 ;
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Here is my code:

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using namespace std;
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void selection(int);
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[code]....

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[Code] ....

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foreach (var tag in tdTags) {
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[Code].....

I have trying to read this documentation but don't understand it. [URL] ....

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#include <iostream>
using namespace std;
int main() {
int j;
do {float a;
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[Code] .....

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and so on .. (64 such combinations)[/CODE]

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I created a loop for test set but its incorrect

Code:
// loop for test samples
char basefilename[] = "D://data//";
char , testFilen[160], numiChar[10];

for (int i=1; i<=64; i++) {
strcpy(basefilenme, "D://data//");
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[Code] .....

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Code:
#ifndef ___2B__Homework__LetterGrade__
#define ___2B__Homework__LetterGrade__

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Code:
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]",k[i].bookname);

I have problem when i want to printf all books from database with this:

Code:
for(i=0;i<counter;i++){
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