In this example, we will learn to reverse a string using pointers. The best part is that we will not reverse the string and copy it onto another string, but we will reverse the original string itself.
C Program to Reverse a String Using Pointers
Let's create a file named reversestring.c and add the following source code to it.
#include <stdio.h>
void main()
{
char str[255], *ptr1, *ptr2, temp ;
int n,m;
printf("Enter a string: ");
scanf("%s", str);
ptr1=str;
n=1;
while(*ptr1 !='\0')
{
ptr1++;
n++;
}
ptr1--;
ptr2=str;
m=1;
while(m<=n/2)
{
temp=*ptr1;
*ptr1=*ptr2;
*ptr2=temp;
ptr1--;
ptr2++;;
m++;
}
printf("Reverse string is %s", str);
}
To compile and run the above C program, you can use C Programs Compiler Online tool.
Output:
Enter a string: sourcecodeexamples
Reverse string is selpmaxeedocecruos
Comments
Post a Comment