C Program to Replace All Occurrence of a Character in a String

C Program to Replace All Occurrence of a Character in a String

C program to replace all occurrences of a character in a string; Through this tutorial, we will learn how to replace all occurrences of a character in a string using for loop, while loop and functions in c programs.

Programs and Algorithm To Replace All Occurrence of a Character in a String in C

  • Algorithm To Replace All Occurrence of a Character in a String
  • C Program To Replace All Occurrence of a Character in a String using For Loop
  • C Program To Replace All Occurrence of a Character in a String using While Loop
  • C Program To Replace All Occurrence of a Character in a String using Function

Algorithm To Replace All Occurrence of a Character in a String

Use the following algorithm to write a program to replace all occurrence of a character in a string; as follows:

  1. Input string from user, store it in some variable.
  2. Input character to replace and character new character from user, store it in some variables.
  3. Iterate a loop from start of string str to end.
  4. Inside the loop, swap all old character with new character and terminate the loop.
  5. Print result.

C Program To Replace All Occurrence of a Character in a String using For Loop

/* C Program to Replace All Occurrence of a Character in a String */
 
#include <stdio.h>
#include <string.h>
 
int main()
{
  	char str[100], ch, Newch;
  	int i;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
  	printf("Enter a character replace: ");
  	scanf("%c", &ch);
  	
  	getchar();
  	
    printf("\nEnter character to replace  with  %c : ",ch);
  	scanf("%c", &Newch);
  	
  	for(i = 0; i <= strlen(str); i++)
  	{
  		if(str[i] == ch)  
		{
  			str[i] = Newch;
 		}
	}
	
	printf("\n The Final String after Replacing All Occurrences of '%c' with '%c' = %s ", ch, Newch, str);
	
  	return 0;
}

The output of the above c program; as follows:

Please Enter any String :  c progr@mmer
Enter a character replace: @
Enter character to replace  with  @ : a
The Final String after Replacing All Occurrences of '@' with 'a' = c programmer 

C Program To Replace All Occurrence of a Character in a String using While Loop

/* C Program to Replace All Occurrence of a Character in a String */
 
#include <stdio.h>
#include <string.h>
 
int main()
{
  	char str[100], ch, Newch;
  	int i = 0;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
    printf("Enter a character replace: ");
  	scanf("%c", &ch);
  	
  	getchar();
  	
  	printf("\n Please Enter the New Character :  ");
  	scanf("%c", &Newch);
  	
  	while(str[i] != '
/* C Program to Replace All Occurrence of a Character in a String */
#include <stdio.h>
#include <string.h>
int main()
{
char str[100], ch, Newch;
int i = 0;
printf("\n Please Enter any String :  ");
gets(str);
printf("Enter a character replace: ");
scanf("%c", &ch);
getchar();
printf("\n Please Enter the New Character :  ");
scanf("%c", &Newch);
while(str[i] != '\0')
{
if(str[i] == ch)  
{
str[i] = Newch;
}
i++;
}
printf("\n The Final String after Replacing All Occurrences of '%c' with '%c' = %s ", ch, Newch, str);
return 0;
}
') { if(str[i] == ch) { str[i] = Newch; } i++; } printf("\n The Final String after Replacing All Occurrences of '%c' with '%c' = %s ", ch, Newch, str); return 0; }

The output of the above c program; as follows:

Please Enter any String :  he@@@o
Enter a character replace: @
Please Enter the New Character :  l
The Final String after Replacing All Occurrences of '@' with 'l' = helllo 

C Program To Replace All Occurrence of a Character in a String using Function

/* C Program to Replace All Occurrences of a Character in a String */
 
#include <stdio.h>
#include <string.h>

void Replace_AllOccurrence(char *str, char ch, char Newch);
 
int main()
{
  	char str[100], ch, Newch;
  	int i = 0;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
  	printf("Enter a character replace: ");
  	scanf("%c", &ch);
  	
  	getchar();
  	
  	printf("\nEnter character to replace  with  %c : ",ch);
  	scanf("%c", &Newch);
  	
  	Replace_AllOccurrence(str, ch, Newch);
  	
  	printf("\n The Final String after Replacing All Occurrences of '%c' with '%c' = %s ", ch, Newch, str);
	
  	return 0;
}

void Replace_AllOccurrence(char *str, char ch, char Newch)
{
	int i;

	for(i = 0; str[i] != '
/* C Program to Replace All Occurrences of a Character in a String */
#include <stdio.h>
#include <string.h>
void Replace_AllOccurrence(char *str, char ch, char Newch);
int main()
{
char str[100], ch, Newch;
int i = 0;
printf("\n Please Enter any String :  ");
gets(str);
printf("Enter a character replace: ");
scanf("%c", &ch);
getchar();
printf("\nEnter character to replace  with  %c : ",ch);
scanf("%c", &Newch);
Replace_AllOccurrence(str, ch, Newch);
printf("\n The Final String after Replacing All Occurrences of '%c' with '%c' = %s ", ch, Newch, str);
return 0;
}
void Replace_AllOccurrence(char *str, char ch, char Newch)
{
int i;
for(i = 0; str[i] != '\0'; i++)
{
if(str[i] == ch)
{
str[i] = Newch;
}  
}
}
'; i++) { if(str[i] == ch) { str[i] = Newch; } } }

The output of the above c program; as follows:

Please Enter any String :  c programming
Enter a character replace: m
Enter character to replace  with  m : @
The Final String after Replacing All Occurrences of 'm' with '@' = c progra@@ing 

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AuthorAdmin

Greetings, I'm Devendra Dode, a full-stack developer, entrepreneur, and the proud owner of Tutsmake.com. My passion lies in crafting informative tutorials and offering valuable tips to assist fellow developers on their coding journey. Within my content, I cover a spectrum of technologies, including PHP, Python, JavaScript, jQuery, Laravel, Livewire, CodeIgniter, Node.js, Express.js, Vue.js, Angular.js, React.js, MySQL, MongoDB, REST APIs, Windows, XAMPP, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL, and Bootstrap. Whether you're starting out or looking for advanced examples, I provide step-by-step guides and practical demonstrations to make your learning experience seamless. Let's explore the diverse realms of coding together.

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