Need help with spaces

Question

I am trying to write a code that deletes numbers from a string and outputs words only. It worked just fine when the input is one word without a space, but what if the input had a space in it, the string will read what is before the space . Therefore I need help with removing numbers from a string with spaces.

#include <iostream>
#include <ctype.h>

using namespace std ;

int main (){

int i = 0;
char b[i];
string a;
cin >> b;

while ( b[i]) {

}
if (isalpha(b[i])) {

a = a+b[i];
cout << a;
}

if (b[i] = ' ') {

a = a+b[i];
cout << a;
}
i++;

}

}

Answer 1

You can use getline() and then convert to a c_string or char array.

Answer 2

std::cin stops taking input when encountered by a whitespace character.

Use getline() or fgets() to get strings with spaces in them.

Answer 3

Hakam I just had a look at your program and are you sure it is the correct program you have shared here. and if it is then how is it even compiling without errors ?

Because in its current state there are a some errors in it.( And also the initial size of the input string is 0 )

Answer 4

Arsenic getline() 😉

Answer 5

Hakam
"File not found in this compiler"
Which file?
Which compiler?

Answer 6

Hakam
<ctype.h> is for C, for C++ we include <cctype> instead, note that no .h extension is used, just the name.

#include <cctype>

See this for more info about C headers usage in C++ 👇

https://en.cppreference.com/w/cpp/header

Answer 7

ChaoticDawg editing done 👍🙂

Answer 8

Arsenic true it had errors, but now thanks to your previous comment, i managed to correct it. Here is my code after the edit.

#include <iostream>
#include <ctype.h>
#include <string>
#include <algorithm>

using namespace std ;

int main (){

int i = 0;
char b[i];
string a, s;

getline(cin, a);

for (i = 0; i < a.length(); i++) {

b[i] = a[i]; // i used ur advice here

if (isalpha(b[i])) {s = s +b[i];}
if (b[i] == ' ') {s = s+ " "; }

}

reverse(s.begin(), s.end());
cout << s; //i needed to reverse the output here

}

Answer 9

Use <cctype> (no .h extension) instead of <ctype.h> (load error) 👍

Answer 10

Ipang i am talking about <ctype.h> in this app's compiler. Whenever i try to include it, an error occurs that says file not found, therefors i had to include <ctype> instead

Answer 11

getline() won't work since isalpha() doesn't work with strings, and getline works only with strings

Answer 12

@Hakam.
strings can be indexed just like char arrays, so is alpha() will work.
There are two versions of getline one for char arrays and one for string..

cin.getline(strName, SIZE)....... for c-style string (char arrays)
getline(cin, strName)....... for C++ strings.

Answer 13

Ipang file not found in this compiler
rodwynnejones still not working, I would appreciate it if you would demonstrate in a simple code

Answer 14

Hello I don't speak English well. french?yes