Write a C program to reverse a string using pointers without…

Problem Description:

Write a C program to reverse a string using pointers. The program should take a string input from the user and display both the original and reversed string.

Technical Requirements:

– Programming Language: C

– Language Standard: C99 or later

– Compiler: GCC (GNU Compiler Collection)

– IDE: Code::Blocks / VS Code / Dev-C++ (any)

– Libraries Allowed: stdio.h only

– Do not use built-in string functions like strrev()

– Use pointer-based logic only (no array indexing)

Program Requirements:

– Accept a string (maximum 100 characters)

– Reverse the string using pointers

– Display both original and reversed string

– Code should be simple and well-commented

Sample Input:

hello

Sample Output:

Original string: hello

Reversed string: olleh

My Attempt:

#include <stdio.h>

int main() {

char str[100];

printf(“Enter string: “);

scanf(“%s”, str);

char *start = str;

char *end = str;

char temp;

// Move end pointer to last character

while (*end != ”) {

end++;

}

end–; // move back to last valid character

// Swap characters using pointers

while (start < end) {

temp = *start;

*start = *end;

*end = temp;

start++;

end–;

}

// Output

printf(“Original string: %sn”, str);

printf(“Reversed string: %sn”, str);

return 0;

}

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