C-Program To Reverse A String

Code 1:String reverse in c without using strrev

#include<stdio.h>

int main(){

    char str[50];

    char reverse[50];

    int i=-1,j=0;

    printf("Enter a string : ");

    scanf("%s",str);

   

    while(str[++i]!='\0');

    while(i>=0)

     reverse[j++] = str[--i];

    reverse[j]='\0';

  

    printf("Reverse of string is : %s",reverse);

  

    return 0;

}

output:

Enter a string :Fresherstation.blogspot.in

Reversed string is :ni.topsgolb.noitatsrehserf

 

Code 2:Reverse a string in c without using temp

#include<stdio.h>

#include<string.h>

 

int main(){

    char str[50];

    char *reverse;

    printf("Enter a string ");

    scanf("%s",str);

    reverse = strrev(str);

   

    printf("Reversed string is %s",reverse);

   

    return 0;

}

output:

Enter a string :Fresherstation.blogspot.in

Reversed string is :ni.topsgolb.noitatsrehserf

 

Code 3:Reverse a string in c using pointers

#include<stdio.h>

int main(){

    char str[50];

    char reverse[50];

    char *sptr = str;

    char *rptr = reverse;

    int i=-1;

    printf("Enter a string ");

    scanf("%s",str);

   

    while(*sptr){

     sptr++;

     i++;

    }

    while(i>=0){

     sptr--;

     *rptr = *sptr;

     rptr++;

     --i;

    }

    *rptr='\0';

  

    printf("Reversed string is : %s",reverse);

  

    return 0;

}

output:

Enter a string :Fresherstation.blogspot.in

Reversed string is :ni.topsgolb.noitatsrehserf