c - type casting float to int -

i getting float input user code.

1. float change = getfloat(); 2. change *= 100; 3. int remainder = change; 

however, when user inputs 4.2 line 2 turns change variable 419.999969 , line ends 419. how change program effectively change float int.

one way round nearest whatever. simple version be

change = (int)(change + 0.5); 

(this go between steps 2 , 3.) rounds less 0.5 down, , greater or equal 0.5 up.

there may additional complications if want round negative numbers, or if want round other nearest 1, should started.