作业中的结构错位
我首先在 Eclipse 中完成所有编程作业，然后将它们放入 Putty 中并提交给我们的老师。在 Eclipse 中，我的方法之一出现了这个奇怪的错误。
它显示“标记上的语法错误，错误的构造。”
public static int factorial(int iVal, boolean DEBUG)
{
int result;
// Defensive programming
if(iVal <= 0)
{
System.out.println("Error: iVal cannot be a negative number!");
System.exit(0);
}
// Calculate result
int factor = iVal;
int counter = iVal - 1;
for(int i = counter; i > 1; i--)
{
if(DEBUG = true)
{
System.out.println("DEBUG");
System.out.println(" Finding the factorial of " + factor);
System.out.println(" Currently working on " + i);
System.out.println(" With an intermediate result of" + iVal);
}
iVal *= i;
}
result = iVal;
// Return result
return result;
} // End of factorial method
它的错误位于由
System.out.println(" Currently working on " + i);
“有什么想法吗？”组成的行上。
I do all my programming assignments in eclipse first before putting them in putty and submitting them to our teacher. In eclipse, I have this strange error in one of my methods.
it says "Syntax error on token(s), misplaced construct(s)."
public static int factorial(int iVal, boolean DEBUG)
{
int result;
// Defensive programming
if(iVal <= 0)
{
System.out.println("Error: iVal cannot be a negative number!");
System.exit(0);
}
// Calculate result
int factor = iVal;
int counter = iVal - 1;
for(int i = counter; i > 1; i--)
{
if(DEBUG = true)
{
System.out.println("DEBUG");
System.out.println(" Finding the factorial of " + factor);
System.out.println(" Currently working on " + i);
System.out.println(" With an intermediate result of" + iVal);
}
iVal *= i;
}
result = iVal;
// Return result
return result;
} // End of factorial method
It has the error placed on the line consisting of
System.out.println(" Currently working on " + i);
Any ideas?
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比较是
==，赋值是=。另外，如果您只是测试布尔值，则根本不需要进行比较，只需使用
Comparison is
==, assignment is=.Also, if you are just testing a boolean value, you don't need to do a comparison at all and just use
您在 if 语句中有一个赋值：
if(DEBUG = true){
这是合法的（并且可以编译），因为
DEBUG的类型是boolean，但它始终是真实。You have an assignment in an if statement:
if(DEBUG = true){
This is legal (and compiles) because
DEBUGis of typeboolean, but it is alwaystrue.