public class Main {
public static void main(String[] args) {
int sum = 0;
int m = 20;
int n = 100;
// 使用do while计算M+...+N:
do {
sum+=m;
m++;
} while (m<=n);
System.out.println(sum);
}
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阳光透过窗台201702
public class Main {
public static void main(String[] args) {
int sum = 0;
int m = 20;
int n = 100;
// 使用do while计算M+...+N:
do {
sum+=m;
m++;
} while (m<=n);
System.out.println(sum);
}
}