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JAVA_57_2.java
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JAVA_57_2.java
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package chapter6;
/**
* 和为s的连续正数序列
* <p>
* 输入一个正数s,打印出所有和为s的连续正数序列(至少含有两个数)
* 例如输入15 1+2+3+4+5=4+5+6=7+8
* <p>
* 考察点:前后指针
*/
public class JAVA_57_2 {
public static void main(String[] args) {
printAllContinueSeq(15);
}
public static void printAllContinueSeq(int sum) {
if (sum <= 2) {
return;
}
int small = 1;
int big = 2;
int s = small + big;
while (small <= ((1 + sum) >> 1) && (big - small) >= 1) {
if (s > sum) {
s -= small;
small++;
} else if (s < sum) {
big++;
s += big;
} else {
System.out.print("result: ");
for (int i = small; i <= big; i++) {
System.out.print(i);
if (i != big) {
System.out.print('\t');
}
}
System.out.println();
big++;
s += big;
}
}
}
}