c/c++ float round up

c/c++ float round up

float val = 37.0201;

float rounded_down = floorf(val * 100) / 100;   /* Result: 37.02 */
float nearest = roundf( val * 100) / 100;  /* Result: 37.02 */
float rounded_up = ceilf(val * 100) / 100;      /* Result: 37.03 */

TCHAR number[24]; // dummy size, you should take care of the size!
swprintf_s( number, L "%.2f", rounded_up );
AfxMessageBox( number);

参考链接：http://stackoverflow.com/questions/1343890/rounding-number-to-2-decimal-places-in-c