int secs_per_day = 24 * 60 * 60;
int LIGHTSPEED = 186000; // 186,000 mi/sec speed of light
long miles_traveled = secs_per_day * LIGHTSPEED;
System.out.println("Miles traveled by light in a day: " + miles_traveled);
================================================ ==================================
long secs_per_day = 24 * 60 * 60;
long LIGHTSPEED = 186000; // 186,000 mi/sec speed of light
long miles_traveled = secs_per_day * LIGHTSPEED;
System.out.println("Miles traveled by light in a day: " + miles_traveled);
整数数学。将任何项转换为long
,结果为long
(而不是int
)。喜欢,