C Program to Reverse the String using Recursion

This C Program uses recursive function & reverses the string entered by user in the same memory location. Eg: “program” will be reversed to “margorp”

Here is the source code of the C program to reverse a string. The C Program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/*
```

 * C Program to Reverse the String using Recursion

```
 */
```
```
#include <stdio.h>
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#include <string.h>
```
```
 
```
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void reverse(char [], int, int);
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int main()
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```
{
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```
    char str1[20];
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```
    int size;
```
```
 
```

    printf("Enter a string to reverse: ");

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    scanf("%s", str1);
```
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    size = strlen(str1);
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    reverse(str1, 0, size - 1);
```

    printf("The string after reversing is: %s\n", str1);

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    return 0;
```
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}
```
```
 
```

void reverse(char str1[], int index, int size)

```
{
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```
    char temp;
```
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    temp = str1[index];
```
```
    str1[index] = str1[size - index];
```
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    str1[size - index] = temp;
```
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    if (index == size / 2)
```
```
    {
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        return;
```
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    }
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    reverse(str1, index + 1, size);
```
```
}
```

$ cc pgm12.c
$ a.out
Enter a string to reverse: malayalam
The string after reversing is: malayalam
 
$ a.out
Enter a string to reverse: cprogramming
The string after reversing is: gnimmargorpc

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If you wish to look at other example programs on Strings, go to C Programming Examples on Strings. If you wish to look at programming examples on all topics, go to C Programming Examples.

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