Reverse the string content using a function.

reverse.c

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

/**
* @desc Algorithm to reverse a string passed by command line as argument.
* 
* Compile: * gcc -o reverse.c -o reverse
* Run: ./reverse SAMARA
*
* @author Samuel T. C. Santos
*/

void reverse(char str[]){

	//Get the text length
	int len = strlen(str);
	char tmp, i, j;

	int middle = len / 2;

	//Reverse the string
	for(i=0, j=len-1; i < j; i++, j--){
		tmp = str[i];
		str[i] = str[j];
		str[j] = tmp;
	} 
}

int main(int argc, char **argv){
	
	char* text = argv[1];
	reverse(text);
	printf("Reverse:  %s \n", text);
}