Simple2Code

C Program to Reverse a String

Written by

admin

in

In this article, we will learn how to Reverse a String in C. Before that you may go through the following topic in C.

We will look into two different Programs.

1. First one with the help of a Library function
2. Second, without the function.

Question:
How to write a program in C to Reverse a String with and without the use of library function.

1. String Reversal in C using Library function

In this c program for string reversal, we have used strrev() function to reverse entered string

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

#define MAX_SIZE 100 
int main()
{
   char str[MAX_SIZE];

   printf("Enter a string: \n");
   fgets(str, MAX_SIZE, stdin);

   strrev(str);

   printf("Reverse of entered String: %s\n", str);

   return 0;
}

The output of reverse the string in C.

2. String Reversal in C without Library function

In this c program for string reversal, we have used while to reverse each character from the entered String.

#include <stdio.h>
#include <string.h>
#define MAX_SIZE 100

int main()
{
  char str[MAX_SIZE];
  int i, j = 0, temp;

  printf("Enter the String:\n");
  fgets(str, MAX_SIZE, stdin);

  i = 0;
  j = strlen(str) - 1;

  while (i < j)
  {
    temp = str[i];
    str[i] = str[j];
    str[j] = temp;

    i++;
    j--;
  }

  printf("Reverse of entered String: %s\n", str);

  return 0;
}

The output of reversing the string in C Programming.

More posts