C/C++ :: How To Define String Of Unknown Length

Mar 7, 2014

how to define a string of undefined length in c programming?

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C++ ::  split String (unknown Length)

Mar 27, 2013

I manage to split this str = "abc,def,123"

to s1 = "abc", s2 = "def", s3 = "123" with this piece of code using find and substr.

string str, s1, s2, s3;
getline(cin, str);
unsigned pos1 = str.find(",");

[Code] ....

But what should I do if the len of the string is unknown ?

For example, str = "abc,def,123,ghi,jkl,456,mno" and so on...

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C++ :: Read A String Of Unknown Length From Stdin

Oct 10, 2014

I want to read a string of unknown length from stdin. I tried to follow the approach from this link. URL....My code is like this:

#include <iostream>
#include <string>
using namespace std;
int n;
cin >> n;
cout << "The value of n is " << n << endl;
}

[code]......

What I have noticed is that if I take integer input from cin (cin >> n;) in the above code before getline, the control does not stop on getline to take str as input from the console. If I don't do (cin >> n) before getline then the control stops on getline and takes the string as input.What is the best way to read from console multiple strings of unknown length in combination with the integers?

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C++ :: Possible To Show Maximum Length That Define A String

Aug 7, 2013

I need to know if it is possible to show the maximum length that is defined a string. I explained it with a example

void charLong(char *a){
cout <<"a defined max long = "<<a-><FUNCTION>;
} int main() {
char str[40];
charLong(&str);
return 0;
}

That the result was : a defined max long = 40.

I know that exist strlen() but this show only the length that is used, I need the definition length. is it possible?

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C :: How To Save Returned Of Unknown Length

Sep 15, 2014

I call a function that returns a string, and I can print it out fine, but I want to test the result of the function to see if it returns 0. But I can't just call the function again (GetNextToken(b)) because it will generate a different token. I can't allocate space for the string because I'm not sure what the size of the returned string is going to be.

Basically I want to see if the GetNextToken(b) returns 0, and if it doesn't then print the string. And running GetNextToken(b) again will give a different result.

Code:
int main(int argc, char **argv) {
SomeStruct* b = CreateStruct(argv[1],argv[2]);
printf("HERE %s", GetNextToken(b));

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C++ :: Reading From Console Multiple Strings Of Unknown Length In Combination With Integers

Oct 10, 2014

I want to read a string of unknown length from stdin. I tried to follow the approach from this link.

[URL]....

My code is like this:

Code:

#include <iostream>
#include <string>
using namespace std;
int n;
cin >> n;
cout << "The value of n is " << n << endl;
string str;
getline(cin, str);
cout << "The entereed string is " << str << endl;

What I have noticed is that if I take integer input from cin (cin >> n in the above code before getline, the control does not stop on getline to take str as input from the console. If I don't do (cin >> n) before getline then the control stops on getline and takes the string as input.

What is the best way to read from console multiple strings of unknown length in combination with the integers?

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C :: Masking A Bit String Of Unknown Size

Mar 2, 2015

I have an assignment where I am trying to get the frac bits of a IEEE number representation. The number of exp and frac bits are given as parameters from the main, but I am unsure what bit mask to use as a one-size-fits mask.

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C++ :: Passing Unknown Arguments To Unknown Function

May 1, 2013

So I'm making setTimeout and setInterval functions.

I have this remember function (that is part of Timing class) which takes a function pointer and a void pointer, which are remembered in that object.

Another (timing) function of that object is called in every loop of the program and when specific time passes that function calls the remembered function whit the remembered void pointer as argument.

The problem is that the functions that need to be called require unknown multiple parameters, so what I need to do is make a new class that will store the needed arguments. I make the function that needs to be called and that storage object and pass pointers to them to my remember function, when the remembered function is called it stores the data from storage object in new variables and dose it's thing.

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C :: Program Where User Inputs A String And Prints Out Length Of String

Jan 29, 2014

I would like to understand a function on strings. Below is a code that I took from my teacher where the user inputs a string and prints out the length of the string.

Code:
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
int i = 0;

[Code] ....

Now I understand that it returns the count in "int" so my question is:

Let's say i declared

Code: int count = 0;
at the beginning of the code and then made
Code: count = strlen(str);
why wouldn't i have the same result? Is there a way to do it also?

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C :: Declared A String Constant And Trying To Print Length Of String

Oct 9, 2014

In this code, i declared a string constant and trying to print the length of string. I know that if i write char a1[7] or char a1[] than it runs and give aggregate output, but in this case it is giving double length of string.

Code:

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
}

[code]....

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C++ :: Can't Get Length Of String

Nov 20, 2013

I'm trying some codes about string arrays and taking array length. But i have some problems. I can't get length of string and can't send to a function.

------------------------
#include<iostream>
#include<cstring>
#include<string>
using namespace std;
void GetLength(string);
std::string Words[]={"table","gun","programming"};
int main()
{std::string InputWord;

[Code]...

And how can send Matrix to other function?

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C++ :: How To Find Length Of String

Jul 6, 2014

int t;
string a;
cin>>t;
getline(cin,a);
int len=a.length();
cout<<a<<" "<<len;

[code].....

why is the length 0?what can I do to get the correct length of the input string?

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C++ :: Length Of String Array?

Sep 7, 2013

I can't find any method of retrieving the length of an array except for doing this:

string first[] = {"a","be","see"};
int length = sizeof(first)/sizeof(first[0])

This is a very unconventional way of getting the length of an array.

first->length() would return 1 because it returns the number of letters in the first element of the array (which actually makes no logical sense).

first.size() would return 1 aswell as it's practically the same thing.

Since getting the length of an array is such a fundamental feat, how come I can't find a decent method of doing it?
Is there no buildt in method for this? If there is not, why has it not been implemented in the std?

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C++ :: How To Set Fixed Length For String

May 28, 2013

The input consists of one or more packets followed by a line containing only # that signals the end of the input. Each packet is on a line by itself, does not begin or end with a space, and contains from 1 to 255 characters.

it said 1 to 255 characters

i have to use getline(cin,str);

i tried str[255] but some error happen

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C/C++ :: Find Length Of String

Dec 15, 2014

I am stuck here.

printf(" Enter a line of Morse Code for decrypting");
scanf("%s",phr);
len=strlen(phr);
for(a=0;a<36;a++) {
if(strcmp(phr, morse[a])==0)
printf("%c", alpha[a]);
};printf(" ");

The output :

[output] Enter line to encrypt:
..... -.... --...

converting...
5 [/output]

It should read all code, including null. between coded letter one space, between coded word three spaces.

The output should be:

[output]
56 7 [/output]

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C/C++ :: Length Of String Object?

May 7, 2014

consider the following code:

string input;  
getline( std::cin, input )

In the code above, what is the maximum number of characters that can be read into variable input?

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Visual C++ :: How To Get Length Of A String

Sep 20, 2013

Any way to get the length of a string? I have tried:

str.length
str.size
strlen()
Bob

Code:

// Exercise in string manipulation
#include <iostream>
#include <string>
void prtname(std::string str);
using namespace std;
int main() {

[Code]...

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C :: Program To Print The Length Of A String

Oct 20, 2013

Well what the title says, but I can't get it done. This is what I got

Code:
#include <stdio.h>#include <string.h>
int main(void)
{
char word;
int count;
printf("Enter a word.

[Code] ....

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Visual C++ :: Return String Length

Jun 7, 2013

PHP Code:

int processString(xxx)
{
   //do something
   return non-null terminated string length


To make the function work better we change its internals

PHP Code:

int processString(xxx)
{
   //do something
   return null terminated string length


This phenomenon can be observed by use of mutibyte to wide char conversions, string copy , concatenation functions of MS etc ....

Should I minus one in the return value of the second function to match both versions ?

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C :: Assign Length Of String To Integer Variable

Dec 25, 2014

What I'm trying to do is to assign the length of a string to an integer variable. This is what i tried, it did not work.

Code:
printf("Enter a string
");
fgets(test_pass, 30, stdin);
strcpy(x,(strlen(test_pass)));
printf("%d", x);

This was just a test, and it did not compile. How to do this?

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C++ :: Vector String Return Length Error

Jul 10, 2013

The error is unclear but suggests Its received a bad pointer from another heap. It references dbgheap.c line 1322 and assertion failure

I have two string vector functions the first is called from the main function, the second is called from the first.

Their purpose is to receive a string of text and numbers in a semi-specific format, which the main body of the code reads from a text file, and delaminates the data as to return the first variable in the string as the variable name and the second as the variable value. Along the way it filters out a lot of the unwanted whitespace and punctuation.

E.g "{ VariableNameA 123 }" would be returned as "VariableNameA" And "123"

The code works perfectly for most of the lines in the text file but fails on one particular line where the first variable is 25 characters long. Basically it works for anything 22 characters or less. There are never more than 4 elements in the vector and each element is never intended to be longer than 25 characters.

It fails trying to return from the second split function to the first split function.

Is there a limit to the size of each vector element? I'm struggling to find a way round this without having to rewrite the whole thing.

vector<string> split(const string &s, char delim) {
vector<string> elems;
split(s, delim, elems);
return elems;

[Code] ....

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C/C++ :: Find Length Of First Sentence In Input String

Feb 13, 2015

I have a question about finding the length of first sentence in an input string.

For example, let the input string be: dream in code. community learning

The length of first sentence is 13 (blanks are included). My question is how to create conditions for multiple punctuation signs (!,?)? If while loop goes like:

while((str[i]!='.')||(str[i]!='!')||(str[i]!='?'))

it gives me an error for infinite loop.

Code:
#include<stdio.h>
int main() {
char str[100];int i=0,br=0;
printf("enter a string:");
gets(str);

[Code] ....

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C/C++ :: Program To Compute Length Of String Entered By User By Class

Sep 30, 2014

I want this program by using only iostream.h & conio.h

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C++ :: Matrix With Unknown Dimension?

Feb 18, 2014

I try to write code for one problem which is worked with the matrix.I have written in specific size 5 by 5 and I know the general formula for these matrix based on dimension,I want to write a general form that take the matrix size and then create my favor matrix.However,when I write like below the following error is appeared

int m;
cin>>m;
int A[m][m];

Error: m must be constant

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C/C++ :: Unknown Type Name PGconn

Feb 27, 2015

I have the following code

#include <stdio.h>
#include <stdlib.h>
#include <postgresql/libpq-fe.h>

[Code].....

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C++ :: Cin And Unknown Number Of Integers

Dec 2, 2012

i dont usually write console programs, and i cant seem to find out how one parses an unknown number of arguments with cin.

the program receives an unknown amount of integers in stdin, and i need to parse them withouth hanging.

Unfortunately, stdin is a async. stream and blocks, if it doesnt find any integers left.

I cant use peek() or seek() either, as both are async, too, (which makes me wonder what their exact use is?).

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