Program to generate Airtel Tune

 #include<dos.h>  
 #include<stdio.h>  
 int main(void)  
 {  
   float A,Bb,D,G,F;  
   A = 440;  
   G = 780;  
   Bb = 461;  
   D = 586;  
   F = 687;  
   sound(G);  
   delay(500);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(500);  
   nosound();  
   sound(2*D);  
   delay(500);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(2*Bb);  
   delay(250);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(500);  
   nosound();  
   sound(2*A);  
   delay(500);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(250);  
   sound(G);  
   delay(250);  
   sound(2*A);  
   delay(250);  
   sound(2*Bb);  
   delay(500);  
   sound(2*A);  
   delay(500);  
   sound(G);  
   delay(250);  
   sound(F);  
   delay(250);  
   sound(D);  
   delay(500);  
   nosound();  
   //end 1  
   sound(G);  
   delay(500);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(500);  
   nosound();  
   sound(2*D);  
   delay(500);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(2*Bb);  
   delay(250);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(500);  
   nosound();  
   sound(2*A);  
   delay(500);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(250);  
   sound(G);  
   delay(250);  
   sound(2*A);  
   delay(250);  
   sound(2*Bb);  
   delay(500);  
   sound(2*A);  
   delay(500);  
   sound(G);  
   delay(250);  
   sound(F);  
   delay(250);  
   sound(D);  
   delay(500);  
   nosound();  
   //end 2  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(250);  
   sound(G);  
   delay(250);  
   sound(2*A);  
   delay(250);  
   sound(2*Bb);  
   delay(500);  
   sound(2*A);  
   delay(500);  
   sound(G);  
   delay(250);  
   sound(F);  
   delay(250);  
   sound(D);  
   delay(500);  
   nosound();  
   sound(2*A);  
   delay(250);  
   nosound();  
   sound(G);  
   delay(250);  
   nosound();  
   sound(F);  
   delay(250);  
   sound(G);  
   delay(250);  
   sound(2*A);  
   delay(250);  
   sound(2*Bb);  
   delay(500);  
   sound(2*A);  
   delay(500);  
   sound(G);  
   delay(250);  
   sound(F);  
   delay(250);  
   sound(D);  
   delay(500);  
   nosound();  
   return 0;  
 }