C Programming Code Examples
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Program to Reverse the String using Both Recursion and Iteration
/* Program to Reverse the String using Both Recursion and Iteration */
#include <stdio.h>
#include <string.h>
/* Function Prototype */
void disp_str1_rec(char *);
void main()
{
char str1[100], *ptr;
int len1 = 0, i;
char ch;
printf("Enter the string:\n");
scanf("%[^\n]s", str1);
ptr = str1;
len1 = strlen(str1);
printf("Using iteration:\n");
for (i = len1 - 1; i >= 0;i--) /* Iterative loop */
{
ch = str1[i];
printf("%c", ch);
}
printf("Using recurssion:\n");
disp_str1_rec(ptr);
}
/* Code to reverse the string using Recursion */
void disp_str1_rec(char *stng)
{
char ch;
if (*stng != '\0')
{
ch = *stng;
stng++;
disp_str1_rec(stng);
printf("%c", ch);
}
else
return;
}
Writes the C string pointed by format to the standard output (stdout). If format includes format specifiers (subsequences beginning with %), the additional arguments following format are formatted and inserted in the resulting string replacing their respective specifiers. printf format string refers to a control parameter used by a class of functions in the input/output libraries of C programming language. The string is written in a simple template language: characters are usually copied literally into the function's output, but format specifiers, which start with a % character, indicate the location and method to translate a piece of data (such as a number) to characters. "printf" is the name of one of the main C output functions, and stands for "print formatted". printf format strings are complementary to scanf format strings, which provide formatted input (parsing). In both cases these provide simple functionality and fixed format compared to more sophisticated and flexible template engines or parsers,
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