软件工程课后作业—结对编程—四则运算

/**
* \file
* \author	mahanlu，qinqiu
* \date	2017-03-29
* \copyright	mahanlu,qinqiu
*
* \brief	四则运算
*
*/
public class test {

public static void main(String[] args) {
//运算符号数组
String simple[] = {"+","-","*","/"};
for(int j = 0;j<5;j++){
//随机生成【1-100】之间的随机数
String str = String.valueOf((int) (Math.random()*100+1));
//生成四则运算的数字个数,至少三个,最多五个
int a = (int) (Math.random()*3+3);
for(int i = 0;i < a-1;i++){
//生成四则运算的数字
int b = (int) (Math.random()*100+1);
//生成运算符的位置
int c = (int) (Math.random()*4);
str += simple[c]+String.valueOf(b);
}
System.out.println(str);
}

}

}