用JAVA编写一个实现加法运算的程序

public class Plus {

public static void main(String[] args) {

String fristParam = args[0]

String secondParam = args[1]

String result = plus(fristParam, secondParam)

System.out.println(result)

}

private static String plus(String _sFristParam, String _sSecondParam) {

String sResult = null

if (isVirtual(_sFristParam) || isVirtual(_sSecondParam)) {

sResult = virualPlus(_sFristParam, _sSecondParam)

}

else {

sResult = normalPlus(_sFristParam, _sSecondParam)

}

return sResult

}

private static String normalPlus(String _sFristParam, String _sSecondParam) {

if (_sFristParam == null || _sSecondParam == null) {

return "对不起输入有错，请重新输入"

}

int nFristParam = Integer.parseInt(_sFristParam)

int nSecondParam = Integer.parseInt(_sSecondParam)

int nResult = nFristParam + nSecondParam

String sResult = String.valueOf(nResult)

return sResult

}

private static String virualPlus(String _sFristParam, String _sSecondParam) {

String sFirstActual = getActual(_sFristParam)

String sFirstVirtual = getVirtual(_sFristParam)

String sSecondActual = getActual(_sSecondParam)

String sSecondVirtual = getVirtual(_sSecondParam)

String sResult = null

int nFirstActual = 0

int nFirstVirtual = 0

int nSecondActual = 0

int nSecondVirtual = 0

int nVirtual = 0

int nActual = 0

if (sFirstActual == null || sFirstVirtual == null || sSecondActual == null ||

sSecondVirtual == null) {

return "对不起输入的虚数有错，请重新输入"

}

nFirstActual = Integer.parseInt(sFirstActual)

nFirstVirtual = Integer.parseInt(sFirstVirtual)

nSecondActual = Integer.parseInt(sSecondActual)

nSecondVirtual = Integer.parseInt(sSecondVirtual)

nVirtual = nFirstVirtual + nSecondVirtual

nActual = nFirstActual + nSecondActual

String sVirtual = String.valueOf(nVirtual)

String sActual = String.valueOf(nActual)

sResult = sActual + "+" + sVirtual + "i"

return sResult

}

private static String getVirtual(String _sParam) {

String[] members = _sParam.split("\\+")

String sResult = (members[1] != null) ? members[1].substring(0, 1) : null

return sResult

}

private static String getActual(String _sParam) {

String[] members = _sParam.split("\\+")

String sResult = (members[0] != null) ? members[0] : null

return sResult

}

private static boolean isVirtual(String _sParam) {

return (_sParam.indexOf("i") != -1) ? true : false

}

}

自己改一下吧，基本上没问题

import java.util.Scanner

public class Main {

public static void main(String[] args) {

Scanner pi =new Scanner(System.in)

int a=pi.nextInt()

int b=pi.nextInt()

System.out.println(a+b)

}

}

java中的加法使用+符纳液态埋型号来计算最后的结果。

具体代码如下：洞源

public class Demo {

public static void main(String[] args) {

int x = 3

int y = 4

int result = x + y

System.out.println(result)

}

}

其中需要注意的是代码需写在主方法（main方法）中，否则程序无法运行；还有int型变量的初始值是0，即如果不给int型变量赋值的话，默认这个变量的值为0。

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