C Exercises: Get reverse of a string
C Recursion: Exercise-9 with Solution
Write a program in C to reverse a string using recursion.
Pictorial Presentation:
Sample Solution:
C Code:
#include<stdio.h>
#define MAX 100
char* ReverseOfString(char[]);
int main()
{
char str1[MAX],*revstr;
printf("\n\n Recursion : Get reverse of a string :\n");
printf("------------------------------------------\n");
printf(" Input any string: ");
scanf("%s",str1);
revstr = ReverseOfString(str1);//call the function ReverseOfString
printf(" The reversed string is: %s\n\n",revstr);
return 0;
}
char* ReverseOfString(char str1[])
{
static int i=0;
static char revstr[MAX];
if(*str1)
{
ReverseOfString(str1+1);//calling the function ReverseOfString itself
revstr[i++] = *str1;
}
return revstr;
}
Sample Output:
Recursion : Get reverse of a string : ------------------------------------------ Input any string: w3resource The reversed string is: ecruoser3w
Flowchart:
C Programming Code Editor:
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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