public int sum(int t){if(i<=100&&i>0){return sum(t+1);}return 0;}调用就行了!
我只把这个函数写出来: public int Cumulative(int n) { if(n==1) return 1; else return n+f(n-1);}
pulic class sum{ sum(){ sum=0; for(i=0;i<=100;i++){ sum=sum+1} }public static void main(String[] args){ new sum();} }