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C String Reverse

                         

In this section, you will study how to reverse a string. You can see in the given example, a recursive function reverse(int i) is created. Inside the method, we are calculating the length of a specified string using a library function strlen(). Then string st[i] and st[strlen(st)-i-1] are swapped as: c= st[i];  
st[i]=st[strlen(st)-i-1]; 
st[strlen(st)-i-1]=c;

Statements shown above will reverse the string.

Here is the code:

 

StringReverse.C

#include <stdio.h>
#include <conio.h>
#include <string.h>
int reverse(int i);
char st[]="Hello World";
void main() {
  printf("\nThe string is: %s", st);
  reverse(0);
  printf("\nReversed string is: %s", st);
  getch();
}
int reverse(int i) {
  if (i<(strlen(st)/2)) {
    char c;
    c= st[i];
    st[i]=st[strlen(st)-i-1];
    st[strlen(st)-i-1]=c;
  }
  return 0;
}

Output will be displayed as:

STRING~1.EXE

Download Source Code:

                         

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