题目:编写一个函数,输入n为偶数时,调用函数求1/2+1/4+…+1/n,当输入n为奇数时,调用函数1/1+1/3+…+1/n
Scanner scanner = new Scanner(System.in);
int num = scanner.nextInt();
double sum = 0;
if (num%2!=0) {
for (int i = 1; i <= num; i=i+2) {
sum += 1.0/i;
System.out.print(1+"/"+i+"\t");
System.out.print(1.0/i+"\t");
System.out.println("");
}
}else {
for (int i = 2; i <= num; i=i+2) {
sum += 1.0/i;
System.out.print(1+"/"+i+"\t");
System.out.print(1.0/i+"\t");
System.out.println("");
}
}
System.out.println(sum);