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

int main(){
	char *value;
	value = getenv("SSH_CLIENT");
	if(value == 0){
		printf("Client does not seem to be using SSH\n");
		return 1;
	}

	printf("value = %s\n", value);
	printf("value starts with %c\n", value[0]);
	/* c++ way:
	cout << "value = " << value << "\n";
	*/

	return 0;
}