# include & ltmath.h & gt
int main()
{ long int jisuan(short int a,short int n);
short int a=0,n,I;
Printf ("Please enter: \ na =");
i=scanf("%hd ",& ampa);
fflush(stdin);
printf(" n = ");
scanf("%hd ",& ampn); ?
fflush(stdin); ?
printf("a=%hd\tn=%hd\n ",a,n);
printf("i=%d\n ",I); //i is used to detect whether a has input;
}