Why op skip after i enter first num.

Question

int num[100],rt;
char op;
printf("Enter number:\n");
scanf("%d",&num[0]);
printf("Enter operator:\n");
scanf("%c",&op);
printf("Enter number:\n");
scanf("%d",&num[1]);

Answer 1

here in the example the first no is int that is of 2 bite and second input is of 1 byte. thats why compiler dosent take it as input . so solution to this is use
fflush (stdin );after scanf function.

Answer 2

can you explain function of fflush(stdin);

Answer 3

it simply clears the input buffer,its like clrscr () but it works for input values but not a single value is manipulated.