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#include<stdio.h>
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#include<stdlib.h>
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#include<time.h>
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int jiaf(int a,int b) //加法题目
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{ int c;
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printf("%d+%d=\n",a,b);
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scanf("%d",&c);
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if(c==(a+b))return 1;
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else return 0;
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}
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int jianf(int a,int b) //减法题目
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{ int c;
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printf("%d-%d=\n",a,b);
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scanf("%d",&c);
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if(c==(a-b))return 1;
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else return 0;
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}
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int text()
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{int a,b,d,i,j,g=0,m,result,agan,gard=0; //a，b为随机数，d为随机加减法，i，j为循环数，m为判断是否开始作答，result为判断答案是否正确，agan为二三次输入的答案。
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while(1) //判断是否准备考试
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{ if(g==3)
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printf("不要乱玩，若再一次则考试结束！！！\n");
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if(g==4)
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break;
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printf("请确定是否开始作答！！！\n");
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printf("开始作答输入1\n");
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printf("还没想好输入2\n"); //备注，提示工作
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scanf("%d",&m);
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if(m==1)
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{ printf("请做好准备！\n");
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printf("一共十道题，可做三次\n");
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printf("________________________\n");
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break;
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}
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else
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{g++;
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continue;
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}
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}if(g!=4)
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{ srand((int)time(NULL));
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for(i=1;i<=10;i++) //开始出题
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{ while(1)
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{ a=0+(rand()%51);
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b=0+(rand()%51);
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if((a+b)>50||(a-b)<0||(b-a)<0)
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continue;
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else
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break;
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}
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d=1+(rand()%2);
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printf("第%d题：",i);
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switch(d)
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{ case 1:result=jiaf(a,b);
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if(result==1)
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{ printf("正确\n"); //回答正确加十分
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gard+=10;
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break;}
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else
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{ for(j=1;j<=3;j++) //回答错误，依次加七分，五分，零分
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{ if(j==3)
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{ printf("你的次数已用完\n");
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printf("该题的正确答案为：%d\n",a+b);
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break;
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}
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else
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{ printf("错误\n");
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printf("请重新输入\n");
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scanf("%d",&agan);
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if(agan==(a+b))
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{printf("正确\n");
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break;
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}
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else
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continue;
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}
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}switch(j){
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case 1:gard+=7;
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break;
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case 2:gard+=5;
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break;
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case 3:gard+=0;
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break;
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}
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break;}
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case 2:result=jianf(a,b);
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if(result==1)
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{ printf("正确\n");
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gard+=10;
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break;
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}
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else
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{
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for(j=1;j<=3;j++)
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{ if(j==3)
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{ printf("你的次数已用尽\n");
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printf("该题的正确答案为：%d\n",a-b);
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break;
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}
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}
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else
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{ printf("错误\n");
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printf("请重新输入\n");
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scanf("%d",&agan);
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if(agan==(a-b)) ))
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{ printf("正确\n");
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break;
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}
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else
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continue;
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}
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}switch(j){
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case 1:gard+=7;
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break;
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case 2:gard+=5;
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break;
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case 3:gard+=0;
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break;
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}
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break;}
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}
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}}printf("你的成绩为：%d\n",gard);
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if(gard>90)printf("你的评价为：SMART\n"); //评价
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else if(gard>=80&&gard<=90)printf("你的评价为：GOOD\n");
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else if(gard>=70&&gard<80)printf("你的评价为： OK\n");
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else if(gard>=60&&gard<70)printf("你的评价为：PASS\n");
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else (gard<60)printf("考试结束，你的评价为：TRY AGAIN\n");}
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int main()
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{ text();
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return 0;
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}
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