64 bit data input in c

hi can any one tell me how to take 64 bit input from console through c language.
thakx

 

%I64d on Windows.

 

thanx 4 your reply xpi0t0s
actually i have to write a program to calculate the number of 1 present in it's bit field.
input number must be 64bit number.

 

OK. I use DWORD64 types in conjunction with %I64d. This is helpful for your project as it's an unsigned type, so you can divide it by 2 without worrying about sign extension.