Using - C
  
 Source Code
  

    
#include<stdio.h>
#include<string.h>

void main() {
	char str[1024];
	int length, i, temp;
	printf("Enter a string: ");
	gets(str);
	
	length = strlen(str);
	
	for(i=0; i < length/2; i++) {
    	temp = str[i];
		str[i] = str[length-1-i]; 
    	str[length-1-i] = temp;       
    }
    
printf("Reversed:  %s",str);
}

    

Enter a string: Pro Player
Reversed:  reyalP orP

        
Using - C++
        
 Source Code
        

        
#include<iostream>
#include<string.h>
using namespace std;

int main() {
	string str;
	int length, temp;
	cout<< "Enter a string: ";
	getline(cin,str);
	
	length = str.length();
	
	for(int i=0; i < length/2; i++) {
    	temp = str[i];
		str[i] = str[length-1-i]; 
    	str[length-1-i] = temp;       
    }
    
  cout<< "Reversed:  "<< str;
return 0;
}

      

Enter a string: algorithms
Reversed:  smhtirogla