Question

In C Programming Language,

write a program Character Pointers and Functions. Keyboard input to enter one character string. Using a single dimension array, populate the array with the character string, call a function using pointers to reverse order the character string, pass back to the main the output and total_count_of_characters. (maybe use a global variable for the total count).

Print display the reversed char string and total_count.

Answer 1

//do comment if any problem arises
//Code
#include <stdio.h>
#include <string.h>
int total_count = 0;
void reverse(char *string)
{
//calculate string length by calling strlen
//you can also use your custom function or comment
//if you don't want to use strlen
total_count = strlen(string);
//loop i from 0 to length of string/2
for (int i = 0; i < total_count / 2; i++)
{
//store one variable of array to be swapped in temporary variable
char temp = *(string + i);
*(string + i) = *(string + (total_count - i - 1));
*(string + (total_count - i - 1)) = temp;
}
}
int main()
{
//string of max 100 characters
//you can modify it
char string[100];
//read string from user
printf("Enter a character string: ");
gets(string);
//call reverse function
reverse(string);
//print reversed string
printf("Reversed string: %s", string);
//print total count
printf("\nTotal count of characters: %d", total_count);
}

Output:

Enter a character string: 1234 Reversed string: 4321 Total count of characters: 4