C Language Progarm To Generate ARMSTRONG,RAMANUJAM and STRONG Numbers

#include

<stdio.h>

#include

<math.h>

main()

{

int j,a,b,c,d,i,res,ch;

printf("1.ARMSTRONG NOS  \n 2.RAMANUJAM NOS \n3.STRONG NOS");

printf("\nENTER CHOICE:");

scanf("%d",&ch);

switch(ch)

{

case 1:

for(i=100;i<=999;i++)

{

a=i%10; b=i/10; c=b%10; d=b/10;

res=pow(a,3)+pow(c,3)+pow(d,3);

if (res==i) printf("\n%d",i);

}

break;

case 2:           printf("\nrama");

for(i=1000;i<=9999;i++)

{

c=(i%100)+(i/100);

if(i==(c*c)) printf("\n%d",i);

}

break;

case 3:

for(i=100;i<=999;i++)

{ a=i; res=0;

while(a!=0) { c=1;

b=a%10;

for(j=1;j<=b;j++)

c=c*j;

res=res+c;

a=a/10;

}

if(res==i) printf("\n%d",i);

}

break;

}

getch();

}

OUTPUT:

1.ARMSTRONG NOS
2.RAMANUJAM NOS
3.STRONG NOS
ENTER CHOICE:1
153
370
371
407
1.ARMSTRONG NOS
2.RAMANUJAM NOS
3.STRONG NOS
ENTER CHOICE:2
rama
2025
3025
9801

Contact:

Mr. Roshan P. Helonde

Mobile: +91-7276355704

WhatsApp: +91-7276355704

Email: roshanphelonde@rediffmail.com