软件开发、小程序制作、系统集成与运维、空间租用、硬件开发、视频监控、技术咨询与支持——联系电话:0311-88999002/88999003
public long sum(int num){long sum = 0;for (int i = 1; i <= num; i++){long f = 1;//求i的i次方for (int j = 1; j <= i; j++){f *= i;}sum += f;}return sum;}