C :: Passing A String To A Function From Main?

Mar 30, 2014

i would like to know if i need to dynamically allocate a string in main before passing it to a function that i have created.

in that function i just read the string and do not change any chat in it.

View 2 Replies


ADVERTISEMENT

C :: Passing Variable From Outside Function To Main?

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.

View 6 Replies View Related

C++ :: Passing Array Of Pointers From A Function To Main

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] .....

View 2 Replies View Related

C :: Passing Int And Float Variables From Main And Getting Values From Another Function

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]...

View 5 Replies View Related

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] .....

View 2 Replies View Related

C :: Passing Argument Of Incompatible Pointer Type - Warning In Function Call In Main

Jun 4, 2013

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

[Code].....

View 2 Replies View Related

C++ :: Passing Arguments From Incompatible Pointer Type - Warning In Function Call Transpose In Main Routine

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] ......

View 2 Replies View Related

C :: Return A String To Then Call It On Main Function?

May 26, 2013

I'm trying to return a string to then call it on main function.

Code:
const char* coiso(int chave){
char str [50];
sprintf(str,"%d",chave);
char txt[50] = ".txt";
strcat(str,txt);
return str;
}
int main () {
const char* info = coiso(8);
printf("%s",info);
}

If I do a printf("%s",str) in coiso function it works but the following code doesn't work.

View 10 Replies View Related

C :: Passing Arguments To Main

Feb 10, 2015

I have a 1wire program from maxim running in visual studio. There is this argument in the main function that requires the com port to be specified the command line. If I do pass it as "COM1" the program works as expected.

I don't want to depend on having to pass "COM1" in the command line and into main. I've tried creating a string for COM1 and passing it right into the if function but it doesn't work.

Code:
int main(int argc, char **argv) {
int len, addr, page, answer, i;
int done = FALSE;
SMALLINT bank = 1;
uchar data[552];

[Code] .....

View 1 Replies View Related

C :: Passing String To Function (strtoull) Failing

Sep 30, 2013

I have a code in which I am passing string "5368709120" to function strtoull() and it should had returned me number 5368709120 but instead it returns me 1073741824 which is incorrect.

What may be the possible cause of this and how to rectify it?

Code:
typedef unsigned long long
ULL_Type;
char *quotaStr = "5368709120";
ULL_Type quota;
quota = strtoull(quotaStr, NULL, 10);

View 3 Replies View Related

C++ :: Demonstrate String Concatenation - Passing Char Array Into A Function

Oct 10, 2013

I have been assigned the following task and I am having difficulty in getting it to compile. The compiler is stopping at line 27 but I don't no what the error is.

The task is as follows:

Write two functions with the following function prototypes:

int my string len(char str[])
void my string cat(char dest[], char src[], int dest size)

Both functions should take zero-terminated strings as input. The first function should return the length of the string to the calling function. The second function should take a source and a destination string and the total size of the array pointed to by dest. It should then concatenated the source string onto the end of the destination string, if and only if the destination string has the capacity to store both strings. If the destination string does not have the capacity it should not alter either, print and error, and return to the calling function. Demonstrate the use both the above functions by using them in a program in which you initialise two character arrays with two strings, print out their length, print out the combined length, and print out the combined string

And this is my code so far:

/* A program to demonstrate string concatenation */

#include <iostream>
#include <string.h>
using namespace std;
int my_string_len(char str[]){ // function to calculate length of a chracter array
int len = 0;

[Code] ....

View 8 Replies View Related

C/C++ :: Passing Var Assigned In A Class File To Functions Outside Of Int Main?

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]....

View 4 Replies View Related

C++ :: Keyboard Function That Is Called In Main Function To Make Shape Move

Jan 19, 2013

Ok so I am working on a game and I'm in the process of developing my Player class. Anyways, what I have is a keyboard function that is called in my main function to make a shape move.

void myKeyboardFunction(unsigned char key, int x, int y) {
switch ( key ) {

[Code].....

But when I try to call it, trying to copy my previous method,

glutKeyboardFunc(Player1.playerControls);

I get an error

error C3867: 'Player::playerControls': function call missing argument list; use '&Player::playerControls' to create a pointer to member

I get an error saying it can't convert parameters. I would just like to understand why the arguments become a problem when I make the function a member of my class, when the first method I used is so easy.

View 2 Replies View Related

C :: How To Print The String In Main

May 23, 2013

if you have something like this how can you print the string in main??

Code:

/#include <stdio.h>
#include <stdlib.h>
void myf(char *p)
{
p="balls";
}
int main()
{

[Code]...

View 2 Replies View Related

C :: Main Function Does Not Return Any Values When Calling Other Function?

Jun 9, 2013

The function is supposed to return value from the file in my main, but I am getting empty value. I am trying to get better with pointer. Right now just teaching myself.

right now the only way for this code to show value is when in put the putchar(*ps) inside my readfile function. I would like to readfile to return value and print in the main function.

Code:

#include <stdio.h>
char *readfile(char filename[]);
int main(int argc, char *argv[] ) {

[Code].....

View 4 Replies View Related

C :: How To Pass Main Function Argument To Some Other Function

Dec 26, 2014

I am writing a program in which a Fucntion has to be wriiten to parse the Command Line . When I include Code for parsing in main fuction iteslf ,its run ok . But I want to make a fucntion of that code and call it from main ,than it show Segmentation error .

By using Debugging I found Some thing is mess with " -m" Parameter of Command line , But Cant Rectify it ..

Code:
int main (int argc, char *argv[]){
//get_parameter_value(argc,argv);
// buffer[packet_size+1]= char ("'");
while (argc > 1) {
if (argv[h][0] == '-')

[Code] .....

View 3 Replies View Related

C/C++ :: How To Get Formation From Pointer Function To Main Function

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] ....

View 2 Replies View Related

C :: String Declaration As Global / Main Local Variable

Nov 14, 2013

When a declare a string e.g.

Code:
char str[30]; as a global variable, the srting is initialized to NULL.

But if I declare char str1[30] INSIDE main(), then the string has garbage inside.... Why this happens??

E.g. the following code snippet...

Code:
#include <stdio.h>
char str[50];
int main(){
char str1[50];

[Code] ....

View 4 Replies View Related

C++ :: Pass From Function To Main

Apr 24, 2014

Why the value does not return; Here is code

#include <iostream>
#include <string>
#include <ctime> // to use the time function
#include <cstdlib>
using namespace std;
int getUserChoose (int);

[Code] ....

here is the output

Welcome to the program of Rock, Paper, Scissors
The computer is ready to play the game
Are you ready to play the game
Y for yes and N for no
Y
R = Rock; P = Paper; S = Scissors
R
You have choose Rock
1TN
1RM
0U
0C

View 5 Replies View Related

C/C++ :: Is It Necessary Function Main Should Return Int?

Jan 24, 2013

If so what is the reason, and the returning int value indicates wat?

View 4 Replies View Related

C++ :: Call Of Non-function In Function Main

Feb 16, 2013

I am getting call of nonfunction in function main <> error and 's' is assigned a value that is never used in the function warning...

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main() {
float a,b,c,s,area;

[Code] ....

View 3 Replies View Related

C++ :: Possible To Change Value Of Variable In Main Using A Function?

Jan 30, 2014

I'm currently writing a poker game and am trying my best to avoid using global variables. I have a few variables in int main() which i was hoping to use to store the value of each players hand. I then created a function which calculates the value of the hand but cannot get this value back into the main function.

For example:

Code:
#include <iostream>
using namespace std;
void getValue(int value) {
value = 4;

[Code] ....

Is there any way i can get the value of value using this function? If not what can I do?

View 8 Replies View Related

C :: How To Print Out Recursive Function In Main

Feb 9, 2013

I am just practicing some recursion and I am having trouble with printing out a recursive function in main. Here is what I have:

Code:

// This function adds the squares 4, 5 = 4*4 + 5*5 recursiveley
int recursive_sumSquares(int m, int n) {
if (m < n) {
return m*m + recursive_SumSquares(m+1, n);
}
else {
return m*m;

[Code]...

I am getting an error that says undefined reference to 'recursive_SumSquares'

View 2 Replies View Related

C :: Function Calling In Main Program

Aug 17, 2013

I have i want to call a function with two results for example x = 1 and y = 2.How do i return this function in c and how do i call such a function in the main program.

View 9 Replies View Related

C++ :: How To Make A Shape Outside Of Main Function

Sep 8, 2014

I know how to define a shape and attach it to a window as follows:

#include <Simple_window.h>
void cir() { Circle c(Point(100,100),50); }
int main() {
Simple_window win(Point(100,100),600,400, "test");

Rectangle r(Point(100,100),Point(300,200));
win.attach(r);
win.wait_for_botton();
}

But how to define a shape (say a circle by that cir() function which is) outside of the main() function? And how to attach it to be visible on window win?

View 4 Replies View Related

C++ :: Overloaded Operator Function In Main

Sep 17, 2013

I don't exactly know how to test my ==friend function in my main.

Here is my .h file:

#include<iostream>
using namespace std;
class Car{
public:
Car();
Car(int yer, string mke);

[Code] ....

View 3 Replies View Related







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