package calculate;
public class Calculate {
public static void main(String[] args) {
// TODO code application logic here
Calculate caculate = new Calculate();
int count=0;
for(int i=0;i<50;i++){
int x=(int)(Math.random()*2);//设置随机0,1变量
int first=(int)(Math.random()*100);//设置随机0-100变量
int second=(int)(Math.random()*100);
int[] result = new int[50];
if(x==0)
caculate.addition(i,first,second,result);//调用加法
else
caculate.subtraction(i,first,second,result);//调用减法
count++;
if(count%5==0) System.out.println("\n");//每五题换行
}
for(int i=0;i<50;i++)
//--------------------------------------------------------------
//此处的result被提示找不到符号-------------------------------------------------
//
System.out.print((i+1)+": " + result[i]);
}
//加法
public void addition(int j,int a,int b,int[] result){
System.out.print((j+1)+": "+a+" + "+b+" = ");
result[j] = a + b;
}
//减法
public void subtraction(int k,int m,int n,int[] result){
System.out.print((k+1)+": "+m+" - "+n+" = ");
result[k] = m - n;
}
}