Question

Write a short program that asks the user for a sentence and prints the result of removing all of the spaces. Do NOT use a built-in method to remove the spaces. You should programmatically loop through the sentence (one letter at a time) to remove the spaces.

Answer 1

C++ program:

#include <iostream>
#include<string.h>
using namespace std;
int main()
{
   cout<<"Enter a String of your choice"<<endl;
string s;
getline(cin, s);
int n = s.length(); // find length of string
  
/*convert String into String array*/
  
char string_array[n + 1];// declare String array
s.copy(string_array, s.size() + 1); // copy string into String array
string_array[s.size()] = '\0'; // enter \0 at the end of string array
  
   /*Removing Spaces*/
  
int i = 0, j = 0;
while (string_array[i]) // while loop till end of the string
{
if (string_array[i] != ' ') { // condition to remove string
                           // if no space then put it into array otherwise left it
                           // if there is space then condition is fail and increment i
                           // and check for another charector
string_array[j++] = string_array[i];
       }
i++;
}
string_array[j] = '\0'; // add '\0' at the end of string
cout<<"String with no whitespace :"<<string_array<<endl; // print String

return 0;
}

Output 1:

Output 2:

Program Snapshot

#include <iostream>
#include<string.h>
using namespace std;
int main()
{
        cout<<"Enter a String of your choice"<<endl;
    string s;
    getline(cin, s); 
    int n = s.length();  // find length of string
    
    /*convert String into String array*/
    
    char string_array[n + 1];// declare String array
    s.copy(string_array, s.size() + 1); // copy string into String array
    string_array[s.size()] = '\0'; // enter \0 at the end of string array 
    
        /*Removing Spaces*/
        
    int i = 0, j = 0; 
    while (string_array[i])  // while loop till end of the string
    { 
        if (string_array[i] != ' ') {  // condition to remove string
                                                                // if no space then put it into array otherwise left it
                                                                // if there is space then condition is fail and increment i
                                                                // and check for another charector
           string_array[j++] = string_array[i];
                }
        i++; 
    } 
    string_array[j] = '\0';  // add '\0' at the end of string
   cout<<"String with no whitespace :"<<string_array<<endl; // print String
   
   return 0;
}