find a triangle exists or not using its three angle

 //find a triangle exists or  not using its three angle 

#include "stdio.h"

int main (){

int a1,a2,a3,total;

printf ("Enter all angle :\n");

scanf ("%i%i%i",&a1,&a2,&a3);

total=a1+a2+a3;

if (total==180){

printf ("the triangle exists \n");

}

else {

printf ("the triangle don't exists ");

}

return 0;

}

               output          otuput                output              output           

Enter all angle :

60

80

40

the triangle exists