How to only accept a certain precision (so many decimals places) in scanf?

Question

In scanf() function I want to take only upto decimal values.Can we achieve it? For example for displaying upto two decimal places we use printf(\"%.2f\",

Answer 1

You can't do that, you can make scanf() read a specific number of characters if you want like

float value;
scanf("%4f", &value);

and suppose the input is

43.23

it will read

43.2

but you can't specify precision.

It doesn't make sense, what you can do is

float value;
if (scanf("%f", &value) == 1)
    printf("%.2f\n", value);

after all, the precision is limited by the binary representation, so making it have only two decimal places is pointless since in arithmetic operations it might be rounded.