public int test(int endNum) { int sum = 0; for (int num = 1; num < endNum; num++) { if(num%2==0){ sum=sum-num; }else{ sum=sum+num; } } return sum; }
1楼的 public int test(int endNum) { int sum = 0; for (int num = 1; num < endNum; num++) { if (num % 2 == 0) { sum = sum - num; } else { sum = sum + num; } } return sum; }这个不错
public class Test { public static void main(String[] args) { System.out.println(test(5)) ; } public static int test(int n){ int sum = 0 ; if(n%2 == 0){ sum = -n/2 ; }else{ sum = -(n-1)/2 + n ; } return sum ; } }
int sum = 0;
for (int num = 1; num < endNum; num++) {
if(num%2==0){
sum=sum-num;
}else{
sum=sum+num;
}
}
return sum;
}
1楼的
public int test(int endNum) {
int sum = 0;
for (int num = 1; num < endNum; num++) {
if (num % 2 == 0) {
sum = sum - num;
} else {
sum = sum + num;
}
}
return sum;
}这个不错
public static void main(String[] args) {
System.out.println(test(5)) ;
}
public static int test(int n){
int sum = 0 ;
if(n%2 == 0){
sum = -n/2 ;
}else{
sum = -(n-1)/2 + n ;
}
return sum ;
}
}