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

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

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

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

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

Algorithm To Replace Last Occurrence of a Character in a String

Use the following algorithm to write a program to replace last occurrence of a character with 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 old character with new character and terminate the loop.
  5. Print result.

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

/* C Program to Replace Last Occurrence of a Character in a String */
 
#include <stdio.h>
#include <string.h>
 
int main()
{
  	char str[100], ch, Newch;
  	int i, index;
  	index = -1;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
    printf("Enter a character replace: ");
  	scanf("%c", &ch);
  	
  	getchar();
  	
  	printf("\nEnter character to replace  %c with : ",ch);
  	scanf("%c", &Newch);
  	
  	for(i = 0; str[i] != '
/* C Program to Replace Last Occurrence of a Character in a String */
#include <stdio.h>
#include <string.h>
int main()
{
char str[100], ch, Newch;
int i, index;
index = -1;
printf("\n Please Enter any String :  ");
gets(str);
printf("Enter a character replace: ");
scanf("%c", &ch);
getchar();
printf("\nEnter character to replace  %c with : ",ch);
scanf("%c", &Newch);
for(i = 0; str[i] != '\0'; i++)
{
if(str[i] == ch)  
{
index = i;
}
}
if(index != -1)
{
str[index] = Newch;
}
printf("\nafter replace:%s",str);
return 0;
}
'; i++) { if(str[i] == ch) { index = i; } } if(index != -1) { str[index] = Newch; } printf("\nafter replace:%s",str); return 0; }

The output of the above c program; as follows:

Please Enter any String :  hate
Enter a character replace: h
Enter character to replace  h with : v
after replace:vate

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

/* C Program to Replace Last Occurrence of a Character in a String */

#include <stdio.h>
#include <string.h> 

int main()
{
  	char str[100], ch, Newch;
  	int i, index;
  	index = -1;
  	i = 0;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
    printf("Enter a character replace: ");
  	scanf("%c", &ch);  	
  	getchar();
  	
  	printf("\nEnter character to replace  %c with : ",ch);
  	scanf("%c", &Newch);
  	
  	while(i <= strlen(str))
  	{
  		if(str[i] == ch)  
		{
  			index = i;
 		}
 		i++;
	}
	
	if(index != -1)
  	{
  		str[index] = Newch;
	}

	printf("\nafter replace:%s",str);
	
  	return 0;
}

The output of the above c program; as follows:

Please Enter any String :  proramming
Enter a character replace: r
Enter character to replace  r with : l
after replace:prolamming

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

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

void Replace_LastOccurrence(char *str, char ch, char Newch);
 
int main()
{
  	char str[100], ch, Newch;
  	int i, index;
  	index = -1;
 
  	printf("\n Please Enter any String :  ");
  	gets(str);
  	
  	printf("Enter a character replace: ");
  	scanf("%c", &ch);
  	
  	getchar();
  	
    printf("\nEnter character to replace  %c with : ",ch);
  	scanf("%c", &Newch);
  	
  	Replace_LastOccurrence(str, ch, Newch);

	printf("\nafter replace:%s",str);
	
  	return 0;
}

void Replace_LastOccurrence(char *str, char ch, char Newch)
{
	int i, index;
  	index = -1;

	for(i = 0; str[i] != '
/* C Program to Replace Last Occurrence of a Character in a String */
#include <stdio.h>
#include <string.h>
void Replace_LastOccurrence(char *str, char ch, char Newch);
int main()
{
char str[100], ch, Newch;
int i, index;
index = -1;
printf("\n Please Enter any String :  ");
gets(str);
printf("Enter a character replace: ");
scanf("%c", &ch);
getchar();
printf("\nEnter character to replace  %c with : ",ch);
scanf("%c", &Newch);
Replace_LastOccurrence(str, ch, Newch);
printf("\nafter replace:%s",str);
return 0;
}
void Replace_LastOccurrence(char *str, char ch, char Newch)
{
int i, index;
index = -1;
for(i = 0; str[i] != '\0'; i++)
{
if(str[i] == ch)
{
index = i;
}  
}
if(index != -1)
{
str[index] = Newch;
}
}
'; i++) { if(str[i] == ch) { index = i; } } if(index != -1) { str[index] = Newch; } }

The output of the above c program; as follows:

Please Enter any String :  hello
Enter a character replace: l
Enter character to replace  l with : r
after replace:helro

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AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of 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 from a starting stage. As well as demo example.

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