p/s: we are not allowed to use %f in printf, we're only allow to use, if, if-else, and while loop for this program. The scanf can be anything and casting is allowed.

Option 4: Print out floating point a) If option 4 is selected, the user should be prompted to enter a number: Please enter the number you would like to print: For input 45.678. the output must then be 45.678000 This option is indeed quite challenging because you cannot use the format indicator of inside the printf0. The decimal point .' can be printed out directly or use the %c option. but you need to find out its position and figure out ways to print out the portions before and after the decimal point. You must also have exactly 6 digits after the decimal point just like that with the %f option