nice_day.c

#include <ctype.h>
#include <stdio.h>
#define MAXSTRING 100

int main(void){
	char c, name[MAXSTRING];
	int i, sum =0;
	
	printf("Hi!, What is your name?\n");
	for (i=0; (c=getchar()) != '\n'; ++i){
		name[i] = c;
		if (isalpha(c))
			sum += c;
	}
	name[i] = '\0';
	printf("\n%s%s%s\n%s",
		"Nice to meet you ", name, ".",
		"Your name spelled backwards is "
	);
	for(--i; i>=0; --i){
		putchar(name[i]);
	}
	printf("\n%s%d%s\n",
		" and the letters in your name sum to ", sum , "."
	);
}