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Sunday 20 May 2012

program to generate and print armstrong numbers

program to generate and print armstrong numbers
armstrong number in c: This program prints armstrong number. In our program we ask the user to enter a number and then we use a loop from one to the entered number and check if it is an armstrong number and if it is then the number is printed on the screen. Remember a number is armstrong if the sum of cubes of individual digits of a number is equal to the number itself. For example 371 is an armstrong number as 33 + 73 + 13 = 371. Some other armstrong numbers are 0, 1, 153, 370, 407.

C code
#include 
#include 
 main() {
 int r;
 long number = 0, c, sum = 0, temp;
 printf("Enter the maximum range upto which you want to find armstrong numbers ");
 scanf("%ld",&number);
 printf("Following armstrong numbers are found from 1 to %ld\n",number);
 for( c = 1 ; c <= number ; c++ ) { 
 temp = c;
 while( temp != 0 ) {
 r = temp%10;
 sum = sum + r*r*r;
 temp = temp/10; 
 }
 if ( c == sum )
 printf("%ld\n", c);
 sum = 0;
 }
 getch();
 return 0; 
}
Output of program

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