Popular explanation of the traditional problem of noi

NOI fritters are back, and the oil pan is tumbling.

Mother-in-law said: Is there any sample input and output? NOI usually has it. One more question, check the input and output files again and again to see if there are any regulations. Usually, you should specify a file name. If I hadn't said it, times might have been different. )

The problem is a bit tricky, because floating-point numbers are binary expressions in computers, and some information in decimal cannot be accurately expressed (which varies from device to device)

Suggested solution:

Wrong judgment (simple)

//Add a variable:

doubke dt

//Add a constant:

# Define jd (double)0.000 1

//One ten thousandth of a second depends on the specific accuracy requirements, just stick to the requirements, but not if the time scale is too small.

//calculation

dt = t 1-T2；

//The judgment statement is changed to

if(dt & gt； -JD & amp； & ampdt & ltJD)printf(" ALL ")；

else if(dt & gt； = JD)printf(" WALK ")；

else if(dt & lt； = JD)printf(" BIKE ")；

Method 2