How would I make the following C function accept only integer values. Floats and char should output printf(" Error ");

int fucntion(){

int i;

do { printf("enter int"); scanf("%d%*c", &i);

if (i < 0) { printf("Exit "); exit(0); } else if ((i < 1) || (i > 50) || (i % 10 > 1)) { printf(" Error "); } else { return i; } } while ((i < 1) || (i > 50) || (i % 10 > 1)); }