C :: File Opened In Main And Passing Pointer To A Function

Sep 14, 2013

I am getting a few compile errors for what might be a simple thing to do. I am opening a file in main, passing that pointer to a function and checking the contents of that file with a regex before I pass it on to build a BST. I am getting the following compile errors, what is wrong. Here are the errors:

Code:
gcc main.c fileCheck.c -o tree
main.c: In function `fileCheck':
main.c:19: error: syntax error before "FILE"
fileCheck.c: In function `fileCheck':

[Code] .....

Fatal error: Command failed for target `tree' Here is the two files and header that seem to be causing me the problems.

main.c

Code:
#include "main.h"
//#include "node.h"
int main(int argc, char *argv[])
FILE *fp;
if (argc > 2)

[Code] ....

And the header file.
main.h

Code:
#ifndef MAIN_H
#define MAIN_H
#ifdef __cplusplus
extern "C" {
#endif

[Code] .....

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Code:
#include <stdio.h>
#include <stdlib.h>
int size_b_row1;
int size_b_col1;

[Code].....

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Jun 4, 2013

#include <stdio.h>
#include <stdlib.h>
int size_b_row1;
int size_b_col1;
int main(void) {
double C[4][4] = {{1,3,5,2},{7,6,2,2},{1,2,7,3},{2,3,5,3}};
double TC[4][4];
transpose(C, TC);

[Code] ......

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Mar 16, 2013

What would be the correct way to call a function within main that has file pointer parameters?

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C++ :: Passing A File Pointer To A Function Is Producing Undesired Output

Oct 27, 2013

I am working on a project and decided to try something simple before I start adding items. I am calling a function from main and that function has a file pointer.

Here is my main.cpp

Code: #include <cstdio>
#include <string>
#include <iostream>
#include "main.h"
extern FILE *fp;
using namespace std;
int main(int argc, char *argv[])

[code]....

Here is the function:

Code:
#include <string>
#include <cstdio>
#include <iostream>
#include "main.h"

[Code] ....

My test file consists of several characters and digits. Nothing special and I at this point in time do not have any type of formatting that needs to be adhered to. I am simply wanting to read the file character by character and print it out. When I run the program, I get this symbol:

Code: If I use a printf statement, such as:
Code: printf("%s
", nextChar);

I get a segmentation fault.

My main.h Code:

#ifndef MAIN_H
#define MAIN_H
void scanner(FILE *);
//char getChar(FILE *);
#endif and lastly my scanner.h Code: #ifndef SCANNER_H
#define SCANNER_H
FILE *fp;
#endif

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Nov 8, 2013

This code is for a program that allows you to play a guessing game or arithmetic game and shows your total score from both as you go along. The program works fine the only problem I'm having is with the score. Is there a way to call the score value from the outside function into main?

Code:
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
//prototype functions
void menu();

[Code] .....

So trying to pass the value of score from the outer function int guessGame() into the score print statement in choice 3 of the main function? Oh and the "17 -turn_count" was just part of the requirements of the assignment.

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Nov 21, 2014

I have a a group of text files that are used as input into a program. Another very similar program needs the same data in a different input format. I am writing a program that will read in each line of data and parse it. I have successfully written the program in main() such that it will read until the end of file. However, I am trying to re-write the program such that the algorithm is in an external function and will read one line at a time and then pass all of the character strings to the main program. The program will not compile and I am positive it has to do with an incorrect use of arrays in passing the variable "token". I am attaching a copy of the main program and the function.

#include <iostream>
#include <fstream>
#include <cstring>
#include <stdio.h>
void Line_Parse(std::ifstream&,std::ostream&,const char* token);
int main(int argc, const char * argv[]) {

[Code] .....

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Feb 3, 2015

I have the main() - which has entries like

Code:

main() {
int ss, ret, z;
float yy;
ret = function1(&yy, &ss, &z);
//int function1(flat *cc, int *dd, int *k) - is it correct?

[Code]...

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Dec 7, 2014

I'm trying to pass the value of an object created from a class file to a function outside of the "Int Main" function in the main.cpp file. I've successfully created the object, I just want to pass it to a void function but I'm getting the scope error below. I'm not sure how to correct. I'm not having much luck with research either (static variables?).

error: 'TicTacToe' was not declared in this scope

main.cpp
#include <iostream>
#include <cstdlib>
#include "Signature.h"
#include "Gameplay.h"
using namespace std;
// Initialize array
char square[10] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};

[code]....

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Feb 6, 2014

I am trying to make a information to pointer function but the problem is how/what number am i putting in for *a...

And can i get that information back to main? and is that right way to split the array in to ? because i have will 200 random number and I need to find the smallest and second smallest element in array.

two_smallest (print, size3,size3,size3,size3);
} void two_smallest (int find_array[] , int size3, int *a, int *a2, int *b,int *b2) {
for (int index = 0; index <= 100; index ++) {
if (find_array[index] < find_array [0]) {
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[Code] ....

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using namespace std;
int* createArray(int n);
int lowesttemp(int *p,int f);
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Aug 2, 2014

I have the following:

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main() {
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[code]....

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Feb 13, 2014

int example (int [], int, *int,*int,*int,*int);
int main () {
My code will be here
example (int array[], int size, &a,&b,&c,&d); // Like this??? I try it didnt work

[Code] ....

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Aug 12, 2013

I know what are pointer's and how to use them but there is one point i am not able to understand. Below is the example code

I understand everything in the below code except 1 thing why i am using pointer to base class object in vector int the main() Function?

Code:
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
// base class

[Code] ...

Here is the lines of code i want to understand.

Code:
vector<Employee*> employees;
employees.push_back(&emp1);
employees.push_back(&mgr1);

I know if i will not use the pointer base class function "virtual double grossPay" will be called for both base class object and derived class object and when i will use pointer with reference to the object because base class function is virtual it will look for same function in derived class and if available it will execute it.

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Aug 24, 2014

I am trying to wright a program that takes student grade data from a command line file, calculates a final grade, and copies the final grades to an output file. So far I have two functions, one that creates a student structure by allocating memory for it and returning its address, and one that should take that address and fill it with data from a line from the input file. My ultimate goal is to use a linked list to connect all the structs, but for now I just want to get the functions working. When I run what I have so far, I get an error C2440 (using visual 2010) that says "cannot convert from 'cStudent *', to 'cStudent', and points to the line where I call my fill function. How should structure pointers be passed?

Code:
#include <stdio.h>
#include <stdlib.h>
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struct student // Declaring student structure globally.

[Code] .....

Also, here is a sample of what a line from the input file would look like:
Bill Gates, 60, 54, 38, 62, 65, 60, 50

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Code:
#include <stdio.h>
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[Code] ....

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//main
int main()
{
srand(unsigned(time(NULL)));
int size;
int *list;
int *listCopy;

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Code:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <iostream>
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[code]....

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Code:

class Vehicle {
public:
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[code].....

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After the main function called d1->Modify; the data stored in _myDataMap will get modified too.

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#include <string>

[Code].....

how I would copy a file's contents into a char buffer and copy it over to another file for files that can't be opened/read in notepad? (Example: a rar file or a .exe ) Not sure if that makes

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[Code] .....

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[Code] ....

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#include <fstream>
#include <string>
#include <windows.h>
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Code:
#include <string>
#include <iostream>
#include <sstream>
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const char * external_library_call() {
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[Code] .....

The idea is to have the definition of the Record class simple and readable and have a maintainable way to add auto-conversion functions to the class. So the lines I commented out are the desirable way how I want my code to look. Unfortunately I could not come up with any way that was close to readable for solving this.

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