- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop 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
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- 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
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
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C Program to Delete a Word from a String
In this tutorial, you will learn and get code about deleting a word from a string. Here the program will ask from user to enter any string, and then a word to delete the given word from given string. The program is created with and without using two dimensional array.
Delete Word from String in C
To delete particular word from the given string in C programming, you have to ask from user to enter the string and then ask to enter the word that has to be delete. Then check for the presence of given word in the string. If found, then delete it as shown in the program given below:
#include<stdio.h> #include<conio.h> #include<string.h> int main() { char str[100], word[20]; int i, j, ls, lw, temp, chk=0; printf("Enter the String: "); gets(str); printf("Enter a Word: "); gets(word); ls = strlen(str); lw = strlen(word); for(i=0; i<ls; i++) { temp = i; for(j=0; j<lw; j++) { if(str[i]==word[j]) i++; } chk = i-temp; if(chk==lw) { i = temp; for(j=i; j<(ls-lw); j++) str[j] = str[j+lw]; ls = ls-lw; str[j]='\0'; } } printf("\nNew String = %s", str); getch(); return 0; }
This program was build and run under Code::Blocks IDE. Here is its sample run:
Now supply any string say this is codescracker and then enter a word say codescracker. Press ENTER
key to see following output:
In the above program, the statement:
for(j=0; j<lw; j++) { if(str[i]==word[j]) i++; }
is used to check for the presence of word (to be delete) with character-by-character matching. But before statement, the value of i gets initialized to temp. So that after the statement, we can check whether the if statement gets evaluated for the number of times that equals to the length of the word or not. If it is, then the word is found. Therefore, the statement:
for(j=i; j<(ls-lw); j++)
str[j] = str[j+lw];
is used to move all the characters (after last character's index of word) to the place from word's first character's index in the string. That is, if word is found in given string at index number 5. And the length of word is 3, therefore we have to move character at 8th index to 5th, and character at 9th index to 6th index, and so on upto the last character of the string.
Never forgot to initialize the new length of the string to ls variable. Every time the word is deleted (if more than one time, word present), just minus the length of string by the length of word. Now place a null terminated character (\0) to the last index of new string.
This program has a limitation. For example, if the string is this is codescracker, and user wants to delete is. Then is from this also gets deleted along with lone is. Therefore, the string becomes th codescracker after deleting is. To overcome this problem, we have another program as given below:
Complete Version of Deleting Word from String Program
Here is the complete version of the previous program. This program also deletes duplicate spaces from the final string.
#include<stdio.h> #include<conio.h> #include<string.h> int main() { char str[100], word[20]; int i, j, ls, lw, temp, chk=0, doIncrement, isSpace; printf("Enter the String: "); gets(str); printf("Enter a Word: "); gets(word); ls = strlen(str); lw = strlen(word); for(i=0; i<ls; i++) { temp = i; doIncrement = 0; for(j=0; j<lw; j++) { if(str[i]==word[j]) { if(temp>0 && (temp+lw)<ls) { if(str[temp-1]== ' ' && str[temp+lw]==' ') doIncrement=1; } else if(temp==0 && (temp+lw)<ls) { if(str[temp+lw]==' ') doIncrement=1; } else if(temp>0 && (temp+lw)==ls) { if(str[temp-1]== ' ') doIncrement=1; } if(doIncrement==1) i++; else break; } } chk = i-temp; if(chk==lw) { i = temp; for(j=i; j<(ls-lw); j++) str[j] = str[j+lw]; ls = ls-lw; i = temp; str[j]='\0'; } } ls = strlen(str); i=0; while(str[i]!='\0') { isSpace = 0; if(str[i]==' ' && str[i+1]==' ') { for(j=i; j<(ls-1); j++) { str[j] = str[j+1]; isSpace = 1; } } if(i==0 && str[i]==' ') { for(j=i; j<(ls-1); j++) { str[j] = str[j+1]; isSpace = 1; } } if(isSpace==0) i++; else { str[j]='\0'; ls--; } } printf("\nNew String = %s", str); getch(); return 0; }
Now let's provide the input string as is this is is is isth codescracker and then is as the word to be delete. Here is its sample run:
Here the word this and isth included to check whether the word is (to be delete) gets matched from any of the side or not. As you can see from both side, is does match with both the words this and isth, and also deletes all the extra spaces.
Remove Word from String Using Two-Dimensional Array
Now let's create the same purpose program using two-dimensional array. Here all the word from given string gets placed in a two dimensional array named stringIn2DArray[] one by one. And then checked for the word (to be delete). If found just perform the task of deleting it as shown here:
#include<stdio.h> #include<conio.h> #include<string.h> int main() { char str[400], word[20], stringIn2DArray[20][20]; int i, j=0, k=0; printf("Enter the String: "); gets(str); printf("Enter the Word (to be Delete): "); gets(word); for(i=0; str[i]!='\0'; i++) { if(str[i]==' ') { stringIn2DArray[k][j]='\0'; k++; j=0; } else { stringIn2DArray[k][j]=str[i]; j++; } } stringIn2DArray[k][j] = '\0'; j=0; for(i=0; i<(k+1); i++) { if(!strcmp(stringIn2DArray[i], word)) stringIn2DArray[i][j]='\0'; } printf("\nThe New String is: "); j=0; for(i=0; i<(k+1); i++) { if(stringIn2DArray[i][j] == '\0') continue; else printf("%s ", stringIn2DArray[i]); } getch(); return 0; }
This program produces the same output as of previous one.
Same Program in Other Languages
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