输入1个实数x，计算并输出其平方根（保留1位小数）。输入华氏温度f，计算并输出相应的摄氏温度c(保留2位小数)。c = 5/9(f-32).输入2个整数time1和time2，表示火车的出发时间和到达时间，计算并输出旅途时间。

有效的时间范围是0000到2359，不需要考虑出发时间晚于到达时间的情况。

输入1个四位数，将其加密后输出。方法是将该数每一位上的数字加9，然后除以10取余，做为该位上的新数字，最后将第1位和第3位上的数字互换，第2位和第4位上的数字互换，组成加密后的新数。-Enter a real number x, is calculated and the output of its square root (to retain a decimal). Enter Fahrenheit f, calculate and output the corresponding Celsius temperature c (to retain two decimal places). c = 5/9 (f-32). enter two integer time1 and time2, said the train s departure time and arrival time, travel time is calculated and output. Effective time fr a me is 0000-2359, do not need to consider the starting time later than the time of arrival of the situation. Enter a four-digit its encrypted output. Is the number of each and every digital plus 9, and then divided by 10 remainder, as the spaces on the new figures, the final will be No. 1 and No. 3 on the number of swaps, No. 2 and No. 4 on the number of swaps, the composition of the new encrypted.