java在倒计时和打印循环时遇到问题
所以我需要我的代码在3个用户输入上以增量打印出来,我有第二个java文件使用点符号来执行方法。所以它应该是这样运行的
拾取>;起始值-拾取增量值-拾取>;终值 所有这些都是用户输入,如果起始值>;然后以用户输入增量从起始值开始计算结束值。但如果结束
import java.util.Scanner;
public class logic {
public static void main(String [] args) {
//new scanner
Scanner input = new Scanner(System.in);
//Data
char ch = 0;
int start = 0;
int end = 0;
int inc = 0;
String printStr = "";
final int SENTINEL = -1;
String menu ="Looping (Demo)" +
"\nStart Value\t [S]" +
"\nIncrement value [I]" +
"\nEnd Value\t [E]" +
"\nFor Looping\t [F]" +
"\nQuit\t\t [Q]" +
"\nEnter Option > ";
while(ch != SENTINEL) {
switch(ch) {
case 'S':
case 's':
start = UtilsDM.readInt("Enter loop start value: ", false);
break;
case 'I':
case 'i':
inc = UtilsDM.readInt("Enter loop increment value: ", false);
break;
case 'E':
case 'e':
end = UtilsDM.readInt("Enter loops end value: ", false);
break;
case 'F':
case 'f':
if(start <= end){
for (int i=start; i<=end; i+=inc) {
System.out.print(i + " ");
}//end loop +
}//end if
else if(start >= end){
for (int i=end; i<=start; i-=inc) {
System.out.print(i + " ");
}//end loop -
}//end else if
System.out.println("\n");
break;
case 'Q':
case 'q':
System.out.println("Terminating upon user command.");
System.exit(0);
break;
default:
System.out.println("Unrecognized character");
break;
}//end switch
ch = UtilsDM.readChar(menu, false);
}//end loop
//computations, algorithms
//outputs, formatting, display
} //end main
}//end class
# 1 楼答案
将案例“F”更改为以下内容,我已对这些更改进行了评论:-