- C++ Programming Examples
- C++ Programming Examples
- C++ Hello World
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- C++ Print Integer
- C++ Add Two Numbers
- C++ Add Sub Mul Div
- C++ Add Digits
- C++ Find Average Perc
- C++ Find Arithmetic Mean
- C++ Sum of n Natural Numbers
- C++ Sum of n Numbers
- C++ Area Perimeter of Square
- C++ Area Perimeter of Rectangle
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- C++ Area Circum of Circle
- C++ Find Simple Interest
- C++ Fahrenheit to Celsius
- C++ Celsius to Fahrenheit
- C++ Print Prime Numbers
- C++ Reverse a Number
- C++ Swap Two Numbers
- C++ Print Multiplication Table
- C++ Find Factorial of Number
- C++ Find Factors of Number
- C++ Find HCF & LCM
- C++ Make Calculator
- C++ Count Digits in Number
- C++ Sum of First & Last Digit
- C++ Product of Digits of Number
- C++ Sum of Squares of Digits
- C++ Interchange Digits of Number
- C++ if else Programs
- C++ Check Even or Odd
- C++ Check Prime or Not
- C++ Check Alphabet or Not
- C++ Check Vowel or Not
- C++ Check Leap Year or Not
- Check Reverse equal Original
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- C++ Check Palindrome or Not
- C++ Check Armstrong or Not
- C++ Divisibility Test
- C++ Find Wage of Labor
- C++ Find Discounted Price
- C++ Find Shipping Charge
- C++ Find Telephone Bills
- C++ Calculate Student Grade
- C++ Largest of Two Numbers
- C++ Largest of Three Numbers
- C++ Number Conversion
- C++ Decimal to Binary
- C++ Decimal to Octal
- C++ Decimal to Hexadecimal
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- C++ Binary to Octal
- C++ Binary to Hexadecimal
- C++ Octal to Decimal
- C++ Octal to Binary
- C++ Octal to Hexadecimal
- C++ Hexadecimal to Decimal
- C++ Hexadecimal to Binary
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- C++ Pattern Programs
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- Find Largest Element in Array
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- Find Second Largest Element
- Find Second Smallest Element
- C++ Sum of All Elements
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- C++ Element on Even Position
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- C++ Print Even Numbers in Array
- C++ Print Odd Numbers in Array
- C++ Count Even/Odd Numbers
- C++ Sum of Even/Odd Numbers
- C++ Count Positive Negative Zero
- C++ Reverse an Array
- C++ Insert Element in Array
- C++ Delete Element from Array
- C++ Merge two Arrays
- C++ Bubble Sort
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- C++ 2D Array Programs
- C++ Add Two Matrices
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- C++ Transpose Matrix
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- C++ 3D Array Programs
- C++ String Programs
- C++ Print String
- C++ Find Length of String
- C++ Compare Two Strings
- C++ Copy String
- C++ Concatenate String
- C++ Reverse a String
- C++ Delete Vowels from String
- C++ Delete Word from String
- C++ Count Character in String
- C++ Count Word in String
- C++ Frequency of Word
- C++ Remove Spaces from String
- C++ Sort a String
- C++ Uppercase to Lowercase
- C++ Lowercase to Uppercase
- C++ Swap Two Strings
- C++ Check Anagram or Not
- C++ Capitalize All Words in String
- C++ Capitalize Specific Character
- C++ Get Numbers from String
- C++ File Programs
- C++ Read a File
- C++ Write Content to File
- C++ Append Data in File
- C++ Read & Display File
- C++ Copy a File
- C++ Merge Two Files
- Count Characters, Words in File
- C++ Capitalize All Words in File
- C++ List Files in Directory
- C++ Delete a File
- C++ Encrypt & Decrypt a File
- C++ Misc Programs
- C++ Print ASCII Value
- C++ Add Binary Numbers
- C++ Generate Random Numbers
- C++ Print Smiling Face
- C++ Days into Years, Months
- Add Two Numbers using Pointer
- C++ Print Fibonacci Series
- Generate Armstrong Numbers
- C++ Find nCr and nPr
- C++ Get IP Address
- C++ Print Date/Time
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C++ Program to Remove All & Extra Spaces from a String
In this article, you will learn and get code to remove spaces from string using a C++ program. Here are the list of programs on deleting or removing of spaces from entered string by user at run-time:
- Remove all Spaces from a String
- Remove only Extra Spaces from a String
In both program, string must be entered by user at run-time.
Remove all Spaces from String
To remove or delete all spaces from a string or a sentence, you have to ask from user to enter the string. And then check for the space, if space gets found, then shift all the character to one index back from where, the space was found, as shown in the program given below:
The question is, write a program in C++ to remove all spaces from string. Here is its answer:
#include<iostream> #include<stdio.h> using namespace std; int main() { char str[200]; int i=0, j, chk; cout<<"Enter the String: "; gets(str); while(str[i]!='\0') { chk=0; if(str[i]==' ') { for(j=i; str[j-1]!='\0'; j++) str[j] = str[j+1]; chk = 1; } if(chk==0) i++; } cout<<"\nString without Spaces: "<<str; cout<<endl; return 0; }
This program was build and run under Code::Blocks IDE. Here is its sample run:
Now supply any string say codes cracker . com as input and press ENTER
key to remove all
spaces from it and print the same string without any space as shown in the snapshot given below:
The dry run of above program with user input codes cracker . com goes like:
- When user enters the string, then it gets stored in str variable in a way that:
- str[0]=c
- str[1]=o
- str[2]=d
- str[3]=e
- str[4]=s
- str[5]=' '
- str[6]=c
- str[7]=r
- and so on upto
- str[18]=m
- And at last index, that is at 19th index, a null terminated character (\0) automatically gets assigned. So str[19]='\0'
- Because the initial value of i is 0. Therefore the condition (of while loop) str[i]!='\0' or str[0]!='\0' or c!='\0' evaluates to be true, therefore program flow goes inside the loop
- Inside the loop, 0 gets initialized to chk. So chk=0
- Now the condition of if, that is, str[0]==' ' or c==' ' evaluates to be false, therefore program flow evaluates the condition of second if
- That is, the condition chk==0 or 0==0 evaluates to be true, therefore program flow goes inside the if's body, and increments the value of i. So i=1
- Now program flow evaluates the condition of while loop again. That is, the condition str[i]!='\0' or str[1]!='\0' or o!='\0' evaluates to be true again, therefore program flow goes inside the loop again
- This process continues, until the condition of while loop evaluates to be false
- If any space occurs, then from the index where a space gets found, we've shifted all the characters to one
index back. For example, if a space is found at index no.5, then:
- character at 6th index gets moved to 5th index
- character at 7th index gets moved to 6th index
- character at 8th index gets moved to 7th index
- and so on
- After shifting all the characters, we've initialized 1 to chk. To check its value, whether it holds its previous value (0) or not. If it holds its previous value, then increments the value of i, otherwise, don't increment the value of i, to start from the same (previous) index, or last evaluation's index
- Because through above example of shifting characters, we've shifted the character at 6th index to 5th index, that is now a new character. That is why, we've used chk variable to check and increment i's value
- In this way, all the spaces gets removed from the string, str. So just print its value after performing the task
Remove Extra Spaces from String
This program removes only extra spaces from the given String. For example, if there are more than one spaces available between any two words, then all the spaces except one, gets removed. Let's have a look at the program:
#include<iostream> #include<stdio.h> #include<string.h> using namespace std; int main() { char str[200]; int i, j, len; cout<<"Enter the String: "; gets(str); len = strlen(str); for(i=0; i<len; i++) { if(str[0]==' ') { for(i=0; i<(len-1); i++) str[i] = str[i+1]; str[i] = '\0'; len--; i=-1; continue; } if(str[i]==' ' && str[i+1]==' ') { for(j=i; j<(len-1); j++) { str[j] = str[j+1]; } str[j] = '\0'; len--; i--; } } cout<<"\nString without Extra Spaces: "<<str; cout<<endl; return 0; }
Here is the initial output produced by this program:
Now supply any string that contains more than one spaces between two words, and press ENTER
to remove
extra spaces from the given string and print the new string as shown in the snapshot given below:
Same Program in Other Languages
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