Answer - 1. #include<stdio.h> #include<conio.h> void main() { int a,b,c,d,e=1; clrscr(); printf("Armstrong Numbers\n"); printf("================="); while (e<=999) { a=e/100; a=a*a*a; b=e%100; c=b/10; c=c*c*c; d=b%10; d=d*d*d; if (e==a+c+d) { printf("\n\t%d",e); } e++;...