Home Posts Topics Members FAQ
billyjay777
7 New Member
Hi,
I have a project where i must use pointers and write a function that strips all the white spacebar spaces out of an array. I also have to count how many white spaces i have. Well i figured out how to count all the white spaces i just don't know how to strip all the white spaces out of the sentence entered. I asked the proffessor and he said one way of doing it would be to crreate another array and copy it to the new array and when it hits a white space not to copy it in to the new array. I understand that,but i don't know how to use pointers to do it.so far i
have this
void stripWhite(char *str)
{
char str2[100];
char*p;
char *t;
}
any help would be great i need it asap.
Sep 27 '06 #1
Subscribe Reply
9 2533 
Banfa 9,065 Recognized Expert Moderator Expert
You need to pointers,
1 to point at the current character to read from the source string.
1 to point at the current character to write to in the destination string.
Initally both pointers will point to the start of their respective arrays
then
Expand|Select|Wrap|Line Numbers
- FOREACHCharacterintheSourceString
- IFitisnotaSPACE
- Copyittothedestinationstring
- Incrementthedestinationstringpointer
- ENDIF
- Incrementthesourcestringpointer
- ENDFOR
Don't forget to write a terminator to the destination string.
Sep 27 '06 #2
reply
vermarajeev 180 New Member
Hi,
I have a project where i must use pointers and write a function that strips all the white spacebar spaces out of an array. I also have to count how many white spaces i have. Well i figured out how to count all the white spaces i just don't know how to strip all the white spaces out of the sentence entered. I asked the proffessor and he said one way of doing it would be to crreate another array and copy it to the new array and when it hits a white space not to copy it in to the new array. I understand that,but i don't know how to use pointers to do it.so far i
have thisvoid stripWhite(char *str)
{
char str2[100];char*p;
char *t;}
any help would be great i need it asap.
Expand|Select|Wrap|Line Numbers
- voidstripWhite(char*str)
- {
- intj=0;
- for(inti=0;str[i]!='\0';++i)
- {
- if(str[i]!='')
- str[j++]=str[i];
- }
- str[j]='\0';
- cout<<str<<endl;
- }
Sep 27 '06 #3
reply
billyjay777 7 New Member
Expand|Select|Wrap|Line Numbers
- voidstripWhite(char*str)
- {
- intj=0;
- for(inti=0;str[i]!='\0';++i)
- {
- if(str[i]!='')
- str[j++]=str[i];
- }
- str[j]='\0';
- cout<<str<<endl;
- }
That works but i have to use pointers.
Sep 27 '06 #4
reply
Banfa 9,065 Recognized Expert Moderator Expert
That works but i have to use pointers.
Adapt it
remember that
array[4]
is equivilent to
*(array+4)
Sep 27 '06 #5
reply
billyjay777 7 New Member
Adapt itremember that
array[4]
is equivilent to
*(array+4)
i am having a hard time understanding how to increment both pointers. I understand that they both start at the same point in there arrays, but i don't understand how to increment them to go to the next character in the array on the first array, but then tell the second array to skip the space.
that is the hardest thing i am dealing with so far i have this now.
void stripWhite(char * str)
{
char str2[100];
char *p;
p=str;
char*t;
t=str2;
{
if(*(p)!=' ')
{
t=p;
}
}
cout<<t<<endl;
}
Sep 27 '06 #6
reply
D_C 293 Contributor
What's so difficult? Always increment the pointer to the string with spaces. If you come upon a space, increment the number of spaces encountered. Otherwise, increment the pointer to the string without spaces.
If you are doing the operation in place, for some reason, then the number of spaces encountered is (ptr_with_space s - ptr_no_spaces).
Sep 28 '06 #7
reply
ltgbau 41 New Member
answer here:
void stripWhite(char * str)
{
char str2[100]="";
char *p;
p=str;
char*t;
t=str2;
int len=strlen(str) ;
int i=0;
int j=0;
while(i<len)
{
if(*(p+i)!=' ')
{
*(t+j)=*(p+i);
j++;
}
i++;
}
cout<<t<<endl;
}
Sep 28 '06 #8
reply
vermarajeev 180 New Member
i am having a hard time understanding how to increment both pointers. I understand that they both start at the same point in there arrays, but i don't understand how to increment them to go to the next character in the array on the first array, but then tell the second array to skip the space.
that is the hardest thing i am dealing with so far i have this now.void stripWhite(char * str)
{
char str2[100];
char *p;
p=str;
char*t;
t=str2;{
if(*(p)!=' '){
t=p;}
}
cout<<t<<endl;}
Hi, I think according to your question it just tells me to use pointers and as what I have posted there is a pointer too (i.e char* str). Also as Banfa said
arr[4] is equivalent to *(arr+4) that too is a pointer. So dont get panic about pointers. Use pointers whenever required. In your question it is never said that you have to use two pointers one for source and the other for destination.... .I just tells me to use pointers....
Try something which is simple and the best solution.
Thankx
Sep 28 '06 #9
reply
billyjay777 7 New Member
Hi, I think according to your question it just tells me to use pointers and as what I have posted there is a pointer too (i.e char* str). Also as Banfa said
arr[4] is equivalent to *(arr+4) that too is a pointer. So dont get panic about pointers. Use pointers whenever required. In your question it is never said that you have to use two pointers one for source and the other for destination.... .I just tells me to use pointers....Try something which is simple and the best solution.
Thankx
sorry for not stating right. And thanks for the help.
Sep 28 '06 #10
reply
Sign in to post your reply or Sign up for a free account.
Similar topics
| 4 2776 How do copy Strings from a single dimensional array to double dimensional array by: Venkat |last post by: Hi All, I need to copy strings from a single dimensional array to a double dimensional array. Here is my program. #include <stdio.h> #include <stdlib.h> C / C++ |
| 1 2489 composition/aggregation: would like to use constructor body rather than initializer list by: Chris K |last post by: I am relatively new to C++ and hope that this question is relevant. I have spent some time at the local library and some time on dejanews, but have no decided to go ahead with my question, since I found no satisfactory answer yet. It is about composed/aggregated classes. I am developing a scientific code (Monte Carlo) in which I find it natural to have classes with several levels of aggregation. C / C++ |
| 9 9893 vector with deep copy by: Gunnar G |last post by: Is there anything like vector in STL, that performes deep copy of the elements it contains? I hope this will appear in future releases of STL :) C / C++ |
| 2 12348 is dict.copy() a deep copy or a shallow copy by: Alex |last post by: Entering the following in the Python shell yields >>> help(dict.copy) Help on method_descriptor: copy(...) D.copy() -> a shallow copy of D >>> Python |
| 11 7394 How to avoid the use of copy constructor when using STL container function (push_back, etc.) by: PengYu.UT |last post by: The following program calls the normal constructor and the copy constructor. By calling the copy constuctor is redundandant, all I want is only a vector of a trial object. Is there any way to avoid the use of the copy constructor? #include <vector> #include <iostream> C / C++ |
| 3 6466 TCP Urgent Pointer Usage by: N. Spiker |last post by: I am attempting to receive a single TCP packet with some text ending with carriage return and line feed characters. When the text is send and the packet has the urgent flag set, the text read from the socket is missing the last character (line feed). When the same text is sent without the urgent flag set, all of the characters are read. I'm reading the data using the blocking read call of the network stream class. The .NET... .NET Framework |
| 5 1694 Experimental only: Pointer copy consturctor does not work by: nagrik |last post by: Hello group, Last week I picked up a thread, which pointed out that if a copy constructor is created with pointers instead of reference, there is a danger of it going in infinite recursion. My observation: 1. Compiler does not complain. C / C++ |
| 4 3145 How to implement a deep copy or shallow copy? by: shuisheng |last post by: Dear All, Is there any easy way to make sure all my object copies are deep copy or shallow copy? I do not like to implement it in each class one by one. Thanks, Shuisheng C / C++ |
| 1 1580 dictionary.copy()? by: 7stud |last post by: Here is some example code: d = {"a":"hello", "b":} x = d.copy() d=10 print x output: {'a': 'hello', 'b': } Python |
| 8595 Changing the language in Windows 10 by: Hystou |last post by: Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,... Windows Server |
| 9142
Problem With Comparison Operator <=> in G++ by: Oralloy |last post by: Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in... C / C++ |
| 1 8875 The easy way to turn off automatic updates for Windows 10/11 by: Hystou |last post by: Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,... Windows Server |
| 8849
Discussion: How does Zigbee compare with other wireless protocols in smart home applications? by: tracyyun |last post by: Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some... General |
| 7699
AI Job Threat for Devs by: agi2029 |last post by: Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development projectplanning, coding, testing, and deploymentwithout human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea... Career Advice |
| 1 6512
Access Europe - Using VBA to create a class based on a table - Wed 1 May by: isladogs |last post by: The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will... Microsoft Access / VBA |
| 5855 Couldnt get equations in html when convert word .docx file to html file in C#. by: conductexam |last post by: I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();... C# / C Sharp |
| 4608 Windows Forms - .Net 8.0 by: adsilva |last post by: A Windows Forms form does not have the event Unload, like VB6. What one acts like? Visual Basic .NET |
| 1 3030 transfer the data from one system to another through ip address by: 6302768590 |last post by: Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system C# / C Sharp |
By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.
To disable or enable advertisem*nts and analytics tracking please visit the page.
