Programming Example
Reverse a sentence using recursion
To understand this example, you should have the knowledge of the following C programming topics:
- C Functions
- C User-defined functions
- C Recursion
To understand this example, you should have the knowledge of the following C programming topics:
#include <stdio.h>
void reverseSentence();
int main() {
printf("Enter a sentence: ");
reverseSentence();
return 0;
}
void reverseSentence() {
char c;
scanf("%c", &c);
if (c != '\n') {
reverseSentence();
printf("%c", c);
}
}Enter a sentence: margorp emosewa
awesome program
This program first prints Enter a sentence: . Then, the reverseSentence() function is called.
This function stores the first letter entered by the user in c. If the variable is any character other than \n (newline), reverseSentence() is called again.
This process goes on until the user hits enter.
When the user hits enter, the reverseSentence() function starts printing characters from last.
First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.