import java.util.Scanner; class Fraction//分数 { public int numerator;//分子 public int denominator;//分母 public void creatFraction() { //--生成值并化简-- boolean bool=false; while(bool==false) { int up=(int)(1+Math.random()*10); int down=(int)(1+Math.random()*10); if(down<=up) { continue; } for(int i=2;;i++) { if(up%i==0&&down%i==0) { up/=i; down/=i; i-=1; } if(i>up||i>down) { break; } } if(down==1) { continue; } else { numerator=up; denominator=down; bool=true; } } //--生成值并化简-- } public String strFraction() { String ud=new String(); ud="("+numerator+"/"+denominator+")"; return ud; } public int getNumerator() { return numerator; } public int getDenominator() { return denominator; } } class Integer//整数 { public int integer; public int downinteger=1; public void creatInteger() { integer=(int)(1+Math.random()*100); } public String strInteger() { String g; g=integer+""; return g; } public int getInteger() { int a=integer; return a; } public int getDownInteger() { int b=downinteger; return b; } } class Operator//符号 { public String operator; public int inoperator; public void creatOperator() { inoperator=(int)(1+Math.random()*4); switch(inoperator) { case 1:{operator="+";break;} case 2:{operator="-";break;} case 3:{operator="*";break;} case 4:{operator="/";break;} default:{System.out.println("运行出错,结束");break;} } } public String getOperator() { String g=operator; return g; } public int getInOperator() { int g=inoperator; return g; } } public class Operations4 { //-----------化简区---------------- static int upSimple(int sup,int sdown)//化简分子 { boolean bool=false; while(bool==false) { for(int i=2;;i++) { if(sup%i==0&&sdown%i==0) { sup/=i; sdown/=i; i-=1; } if(i>sup||i>sdown) { break; } } bool=true; } return sup; } static int downSimple(int sup,int sdown)//化简分母 { boolean bool=false; while(bool==false) { for(int i=2;;i++) { if(sup%i==0&&sdown%i==0) { sup/=i; sdown/=i; i-=1; } if(i>sup||i>sdown) { break; } } bool=true; } return sdown; } //--------计算区--------------- static int getUp(int up1,int down1,int up2,int down2,int fu)//获取计算后的分子 { int up=1,down=1; switch(fu) { case 1: { up=up1*down2+up2*down1; break; } case 2: { up=up1*down2-up2*down1; break; } case 3: { up=up1*up2; break; } case 4: { up=up1*down2; break; } default: { System.out.println("运行错误,结束"); break; } } return up; } static int getDown(int up1,int down1,int up2,int down2,int fu)//获取计算后的分母 { int up=1,down=1; switch(fu) { case 1: { down=down1*down2; break; } case 2: { down=down1*down2; break; } case 3: { down=down1*down2; break; } case 4: { down=down1*up2; break; } default: { System.out.println("运行错误,结束"); break; } } return down; } //------判断------ static int nCont(int nup,int ndown,int nfu) { int n=1;//达到要求 if((nfu==2&&nup<ndown)||(nfu==4&&nup>ndown)) { n=2;//未达要求 } return n; } //--------运算区--------------- public static void main(String args[]) { System.out.print("请输入需要的题数:"); Scanner shuzi=new Scanner(System.in); int SIZE=shuzi.nextInt(); String Ends[]=new String[SIZE]; for(int j=0;j<SIZE;j++) { String strOP=null; //-----------确定数字--------- int number=(int)(2+Math.random()*3);//随机数字个数:2~4个 //舍弃数组[0]的位置,以下都从数组[1]开始 Integer zheng[]=new Integer[number+1]; Fraction fen[]=new Fraction[number+1]; Operator fuhao[]=new Operator[number]; int Array[][]=new int[number+1][2]; String strArray[]=new String[number+1]; int inBrray[]=new int[number]; String strBrray[]=new String[number]; int aup=1,adown=1; boolean bl=false; while(bl==false) { for(int i=1;i<=number;i++)//确定数字在数组中 { int panduan=(int)(1+Math.random()*2);//随机分配整数或分数。1--整数,2--分数 //数字划入Array数组 if(panduan==1) { zheng[i]=new Integer(); zheng[i].creatInteger(); Array[i][0]=zheng[i].getInteger(); Array[i][1]=zheng[i].getDownInteger(); strArray[i]=zheng[i].strInteger(); } if(panduan==2) { fen[i]=new Fraction(); fen[i].creatFraction(); Array[i][0]=fen[i].getNumerator(); Array[i][1]=fen[i].getDenominator(); strArray[i]=fen[i].strFraction(); } //符号划入Barry数组 if(i==number){break;} fuhao[i]=new Operator(); fuhao[i].creatOperator(); inBrray[i]=fuhao[i].getInOperator(); strBrray[i]=fuhao[i].getOperator(); } //---------进行运算---------- if(number==2)//两个数字 { int a1,a2; a1=getUp(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); a2=getDown(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); int nC=nCont(a1,a2,inBrray[1]); if(nC==2) {continue;} aup=upSimple(a1,a2); adown=downSimple(a1,a2); } if(number==3) { if(inBrray[1]<=2&&inBrray[2]>2) { int b1,b2; b1=getUp(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); b2=getDown(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //--------- int a1,a2; a1=getUp(Array[1][0],Array[1][1],b1,b2,inBrray[1]); a2=getDown(Array[1][0],Array[1][1],b1,b2,inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //--------- aup=upSimple(a1,a2); adown=downSimple(a1,a2); } else { int a1,a2; a1=getUp(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); a2=getDown(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //--------- int b1,b2; b1=getUp(a1,a2,Array[3][0],Array[3][1],inBrray[2]); b2=getDown(a1,a2,Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(a1,a2,inBrray[2]); if(nC2==2) {continue;} //---------- aup=upSimple(b1,b2); adown=downSimple(b1,b2); } } if(number==4) { if(inBrray[1]>2) { int a1,a2; a1=getUp(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); a2=getDown(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} if(inBrray[2]<=2&&inBrray[3]>2) { int c1,c2; c1=getUp(Array[3][0],Array[3][1],Array[4][0],Array[4][1],inBrray[3]); c2=getDown(Array[3][0],Array[3][1],Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //--------- int b1,b2; b1=getUp(a1,a2,c1,c2,inBrray[2]); b2=getDown(a1,a2,c1,c2,inBrray[2]); int nC2=nCont(b1,b2,inBrray[1]); if(nC2==2) {continue;} //--------- aup=upSimple(b1,b2); adown=downSimple(b1,b2); } else { int b1,b2; b1=getUp(a1,a2,Array[3][0],Array[3][1],inBrray[2]); b2=getDown(a1,a2,Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //--------- int c1,c2; c1=getUp(b1,b2,Array[4][0],Array[4][1],inBrray[3]); c2=getDown(b1,b2,Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //---------- aup=upSimple(c1,c2); adown=downSimple(c1,c2); } } else { if(inBrray[2]>2&&inBrray[3]<=2) { int b1,b2; b1=getUp(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); b2=getDown(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //--------- int a1,a2; a1=getUp(Array[1][0],Array[1][1],b1,b2,inBrray[1]); a2=getDown(Array[1][0],Array[1][1],b1,b2,inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //---------- int c1,c2; c1=getUp(a1,a2,Array[4][0],Array[4][1],inBrray[3]); c2=getDown(a1,a2,Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //---------- aup=upSimple(c1,c2); adown=downSimple(c1,c2); } else if(inBrray[2]>2&&inBrray[3]>2) { int b1,b2; b1=getUp(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); b2=getDown(Array[2][0],Array[2][1],Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //--------- int c1,c2; c1=getUp(b1,b2,Array[4][0],Array[4][1],inBrray[3]); c2=getDown(b1,b2,Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //---------- int a1,a2; a1=getUp(Array[1][0],Array[1][1],c1,c2,inBrray[1]); a2=getDown(Array[1][0],Array[1][1],c1,c2,inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //---------- aup=upSimple(a1,a2); adown=downSimple(a1,a2); } else if(inBrray[2]<=2&&inBrray[3]>2) { int c1,c2; c1=getUp(Array[3][0],Array[3][1],Array[4][0],Array[4][1],inBrray[3]); c2=getDown(Array[3][0],Array[3][1],Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //--------- int a1,a2; a1=getUp(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); a2=getDown(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //---------- int b1,b2; b1=getUp(a1,a2,c1,c2,inBrray[2]); b2=getDown(a1,a2,c1,c2,inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //---------- aup=upSimple(b1,b2); adown=downSimple(b1,b2); } else { int a1,a2; a1=getUp(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); a2=getDown(Array[1][0],Array[1][1],Array[2][0],Array[2][1],inBrray[1]); int nC1=nCont(a1,a2,inBrray[1]); if(nC1==2) {continue;} //--------- int b1,b2; b1=getUp(a1,a2,Array[3][0],Array[3][1],inBrray[2]); b2=getDown(a1,a2,Array[3][0],Array[3][1],inBrray[2]); int nC2=nCont(b1,b2,inBrray[2]); if(nC2==2) {continue;} //---------- int c1,c2; c1=getUp(b1,b2,Array[4][0],Array[4][1],inBrray[3]); c2=getDown(b1,b2,Array[4][0],Array[4][1],inBrray[3]); int nC3=nCont(c1,c2,inBrray[3]); if(nC3==2) {continue;} //---------- aup=upSimple(c1,c2); adown=downSimple(c1,c2); } } } if(adown==1) { strOP=aup+""; } else { strOP=aup+"/"+adown; } bl=true; } String back=""; for(int i=1;i<=number;i++) { back+=strArray[i]; if(i==number){break;} back+=strBrray[i]; } System.out.print(back+"="); String shuchu=strOP; Ends[j]=shuchu; //-------判定重复-------- int chuqu=1; for(int q=0;q<j;q++) { if(Ends[j]==Ends[q]) { chuqu=2; } } if(chuqu==2) { j--; continue; } //-------- Scanner sca=new Scanner(System.in); String shuru=sca.next(); if(shuchu.equals(shuru)) { System.out.println("正确"); } else { System.out.println("错误,正确答案为:"+shuchu); } } } }
时间: 2024-10-13 01:55:17