question of c programming with solution

1. Point out error, if any, in the following program
main()
{


int i=1;


switch(i)


{


case 1:


printf("\nRadioactive
cats have 18 half-lives");


break;


case 1*2+4:


printf("\nBottle for
rent -inquire within");


break;


}


}

Ans. No
error. Constant expression like 1*2+4 are acceptable
in cases of a switch.

2. Point out the error, if any, in the following program


main()


{


int a