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].....

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C++ :: How To Return Multiple Values To The Main Function

Oct 13, 2013

in a function how do you return multiple values to the main function.

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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.

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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?

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C++ :: How To Return Multiple Value From Function To Main

Feb 25, 2013

Get user input should be done in a function. The function should read the product number, price per unit, and quantity sold and return them to the main().

Display the value of product number, price per unit and quantyty sold in main().

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C++ :: How To Return Value Of A By Calling Function Loop

May 29, 2014

Suppose I have the following function containing while loop:

#include <iostream>
using namespace std;
int Loop () {

[Code]....

here in above code I want to return value of 'a' by calling function 'Loop'. Is there any way to do this??

for above code output should be:

value of a: 10
value of a: 11
value of a: 12
value of a: 13
value of a: 14
value of a: 15
value of a: 16
value of a: 17
value of a: 18
value of a: 19

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C++ :: Pass 2 Arrays Into Void Function And Return Values To One Function?

Feb 12, 2014

I'm trying to pass 2 arrays into a void funtion, and return values to one function.

this is the the program I'm working with, after I'm done I have to split it into 3 files, a header, a main, and a separate cpp file for the functions to live in.

#include <iostream>
using namespace std;
void processArrary(int numberCount[], int Numbers[], int intnumberSize, int numberCountSize);
int main() {
int Scores[26] = {76, 89, 150, 135, 200, 76, 12, 100, 150, 28, 178, 189, 167, 200, 175, 150, 87, 99, 129, 149, 176, 200, 87, 35, 157, 189};
int numberCount[8] = { 0 };

[code]...

The goal of this program is to separate and count the groups of numbers then output the amount of numbers in each group. Near as I can tell, everthing should work, but I'm getting all zeros to be displayed in each group.

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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.

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C :: Return Value From User Defined Function To Main

Nov 14, 2014

I want to return value from user defined function to main.

Code:

#include <stdio.h>
int mult ( int x, int y );
int add(int x, int y);
int loop (int y);
int main() {

[Code] ......

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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]...

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C++ :: Best Way To Return Values From A Function?

Jan 24, 2014

I wanted to return a string I can do

Code:

string parseFilename(string fileName){
return fileName.subtr(/*blah*/);
}

Can I also use pointers/references here though? When would you use a pointer and when just a return statement?

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C++ :: Why Return Values From A Function By Ref Address

Feb 5, 2014

You can return values from functions by ref, address or value you can also do this with parameters, so what is the difference, if you have full return of a passed parameter by ref or address why would you need to ever return the function as a whole?

For ex
Code: int nValue(int& y){
y++;
}
or int& nVlaue(int y){
return y;
}

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C++ :: Return 3 Values From A Single Function

Jun 7, 2013

I've got the program for the most part except one part because it's basically wanting me to return 3 values from a single function and I'm unsure how to do this the way it wants me to. The rules:

Call the user-defined function to read in x in the series to be used for calculating the results. Pass a prompt for x as an input parameter, and return the validated x value to main.

After a valid x has been entered, call the same user defined function a second time, to read in y. Pass the prompt for y as an input parameter, and return the validated number of terms value to main.

After a valid y has been entered, call the same user-defined function a third time, to read in z. Pass the prompt for z as an input parameter, and return the validated z value to main.

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C :: Return 2 Values From A Called Function - Arguments And Parameters

Feb 2, 2013

Is there anyway we can return 2 values from a called function. Example

Code:
float xxxx(float a, float b, float c, float d)
{///
///
///
}

void xxx() {
int e,f,g,h;
////
////
xxx(e,f,g,h);
}

So if I want for example a+b and c+d, can i return those 2 answer? I don't think its possible since I am new into C programming.

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C/C++ :: Function To Return Lowest And Highest Values In Array

Mar 8, 2014

// I believe my loop for the functions work but the values are not returning !

// Acoustic data

#include <iostream>
#include <fstream>
using namespace std;
double low( double []);
double high( double []);
void readArrayr( double [], double , double);

[Code] .....

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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.

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Visual C++ :: Error C3867 Function Call Missing Argument List For Calling Thread Function

Mar 19, 2013

I searched the web for error: C3867... and the discussions where murky or obscure.

My code excerpt is:

#pragma once
#include <windows.h>
#include <stdlib.h>
#include <process.h>
void PutUpfrmIO(void *);
namespace WordParsor {

[Code] .....

I get the generic message:

error C3867: 'WordParsor::Form1::PutUpfrmIO': function call missing argument list; use '&WordParsor::Form1::PutUpfrmIO' to create a pointer to memberc:userskingc++wordparsorwordparsorForm1.h... and the suggestion fix generate another error.

One person suggested the gcroot<> object wrapper... but I do not know how to modify/declair the function or its argument type.

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C++ :: Calling Base Function From Derived Overloaded Function

Nov 10, 2014

Here is a sample of my question

class Base{
public:
int getNum();
private:
int numToGet;
}
class Derived: public Base {
public:
friend ostream& operator<<(ostream& output, const Derived &B);

[Code]...

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C++ :: Calling Function By Sending Char Text Of Function Name

Feb 19, 2014

Is this possible?

int myfunc( int a, int b, char * c )
char a = "(int)myfunc()";
char b = "(int,int,char*)"
call(a, b, ...) // Function name and return type, params

I want to do function what registers forward what will get callback if the time is right. Basically then i dont need to edit and add extra functions into source files. I just have to include header and use register forward function. If there is anything close to this it would be perfect!

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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] .....

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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] ....

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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] ....

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C++ :: Calling A String In One Function Into A New Function

Oct 24, 2013

How would I call a string that sits within a switch loop in the main function, into a separate function?

Like this:

void statistics() {
cout << "Here are the statistics for your entry: " << endl;
cout << "
The size of your entry is " << s.length() << " characters." << endl;
}

I am calling string s from this:

switch (toupper(myChoice)) {
case 'A': cin.ignore();
cout <<"
Please enter your text: ";
getline(cin, s);

[Code] ....

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C++ :: Calling Another Function Within A Function Not Working

Feb 20, 2013

I have two functions bool check_key(string cKey, string eKey) and bool check_digit(char digit1, char digit2), and I have declared both of them globally (is this the right terminology?) right after the "using namespace std;" and right before the "int main(){".

In the first one, I called the second one . But it is giving me the error: "no match for call to `(std::string) (int&)' ".

Code:
bool check_key(string cKey, string eKey) {
if(cKey!="" && eKey=="") return false;
if(cKey=="" && eKey=="") return true;
if(cKey=="" && eKey!="") return true;
if(cKey.length()!= eKey.length()) return false;
bool flag=true;

[Code] ....

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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]....

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C :: Calling Function Via Function Pointer Inside Structure Pointer

Mar 14, 2013

I'm trying to call a function via a function pointer, and this function pointer is inside a structure. The structure is being referenced via a structure pointer.

Code:

position = hash->(*funcHash)(idNmbr);

The function will return an int, which is what position is a type of. When I compile this code,

I get the error: error: expected identifier before ( token.

Is my syntax wrong? I'm not sure what would be throwing this error.

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