为什么这样写出来的结果是0，不是650？
public class Demosum {
public static void main(String[] args) {
int sum = 0;
int i = 0;
do {
sum = i + sum;
i++;
} while (i % 2 == 0 && i < 51);
System.out.println("求和是：" + sum);
}
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public class Demosum {
public static void main(String[] args) {
int sum = 0;
int i = 0;
do {
sum = i + sum;
i++;
} while (i % 2 == 0 && i < 51);
System.out.println("求和是：" + sum);
}
2018-09-19
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