作业地址：https://edu.cnblogs.com/campus/nenu/2016CS/homework/2266
coding地址：https://coding.net/u/e1209548561/p/f4/attachment
没找到组。。。。单出来了，所以我没有体会
代码如下：
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<string.h> 4 #include<time.h> 5 #include<math.h> 6 /*#define path D:\test.txt 7 int main(int argc,char* argv[]) 8 {char a[2]={'-','c'}; 9 if(strcmp(a,argv[0])==0) 10 {*/ 11 int main() 12 { 13 14 double n,answer,youranswer,num1,num2,num3,num4; 15 int n1,n2,n3,n4,om1,om2,om3,m=0; 16 char oper[4]={'+','-','*','/'}; 17 char wenhao; 18 scanf("%lf",&n); 19 if(n!=(int)n) 20 { 21 printf("题目数量必须是 正整数。"); 22 } 23 else 24 { 25 srand(time(0)); 26 for(int i=0;i<n;i++) 27 { 28 29 n1=rand()%10+1; 30 num1=n1*1.0; 31 n2=rand()%10+1; 32 num2=n2*1.0; 33 n3=rand()%10+1; 34 num3=n3*1.0; 35 n4=rand()%10+1; 36 num4=n4*1.0; 37 om1=rand()%4; 38 om2=rand()%4; 39 om3=rand()%4; 40 printf(" %d %c %d %c %d %c %d ",n1,oper[om1],n2,oper[om2],n3,oper[om3],n4); 41 42 if((om1==0)&&(om2==0)&&(om3==0)) {answer=num1+num2+num3+num4;} 43 else if((om1==0)&&(om2==0)&&(om3==1)) {answer=num1+num2+num3-num4;} 44 else if((om1==0)&&(om2==0)&&(om3==2)) {answer=num1+num2+num3*num4;} 45 else if((om1==0)&&(om2==0)&&(om3==3)) {answer=num1+num2+num3/num4;} 46 47 else if((om1==0)&&(om2==1)&&(om3==0)) {answer=num1+num2-num3+num4;} 48 else if((om1==0)&&(om2==1)&&(om3==1)) {answer=num1+num2-num3-num4;} 49 else if((om1==0)&&(om2==1)&&(om3==2)) {answer=num1+num2-num3*num4;} 50 else if((om1==0)&&(om2==1)&&(om3==3)) {answer=num1+num2-num3/num4;} 51 52 else if((om1==0)&&(om2==2)&&(om3==0)) {answer=num1+num2*num3+num4;} 53 else if((om1==0)&&(om2==2)&&(om3==1)) {answer=num1+num2*num3-num4;} 54 else if((om1==0)&&(om2==2)&&(om3==2)) {answer=num1+num2*num3*num4;} 55 else if((om1==0)&&(om2==2)&&(om3==3)) {answer=num1+num2*num3/num4;} 56 57 else if((om1==0)&&(om2==3)&&(om3==0)) {answer=num1+num2/num3+num4;} 58 else if((om1==0)&&(om2==3)&&(om3==1)) {answer=num1+num2/num3-num4;} 59 else if((om1==0)&&(om2==3)&&(om3==2)) {answer=num1+num2/num3*num4;} 60 else if((om1==0)&&(om2==3)&&(om3==3)) {answer=num1+num2/num3/num4;} 61 //////////// 62 else if((om1==1)&&(om2==0)&&(om3==0)) {answer=num1-num2+num3+num4;} 63 else if((om1==1)&&(om2==0)&&(om3==1)) {answer=num1-num2+num3-num4;} 64 else if((om1==1)&&(om2==0)&&(om3==2)) {answer=num1-num2+num3*num4;} 65 else if((om1==1)&&(om2==0)&&(om3==3)) {answer=num1-num2+num3/num4;} 66 67 else if((om1==1)&&(om2==1)&&(om3==0)) {answer=num1-num2-num3+num4;} 68 else if((om1==1)&&(om2==1)&&(om3==1)) {answer=num1-num2-num3-num4;} 69 else if((om1==1)&&(om2==1)&&(om3==2)) {answer=num1-num2-num3*num4;} 70 else if((om1==1)&&(om2==1)&&(om3==3)) {answer=num1-num2-num3/num4;} 71 72 else if((om1==1)&&(om2==2)&&(om3==0)) {answer=num1-num2*num3+num4;} 73 else if((om1==1)&&(om2==2)&&(om3==1)) {answer=num1-num2*num3-num4;} 74 else if((om1==1)&&(om2==2)&&(om3==2)) {answer=num1-num2*num3*num4;} 75 else if((om1==1)&&(om2==2)&&(om3==3)) {answer=num1-num2*num3/num4;} 76 77 else if((om1==1)&&(om2==3)&&(om3==0)) {answer=num1-num2/num3+num4;} 78 else if((om1==1)&&(om2==3)&&(om3==1)) {answer=num1-num2/num3-num4;} 79 else if((om1==1)&&(om2==3)&&(om3==2)) {answer=num1-num2/num3*num4;} 80 else if((om1==1)&&(om2==3)&&(om3==3)) {answer=num1-num2/num3/num4;} 81 ///////////////// 82 else if((om1==2)&&(om2==0)&&(om3==0)) {answer=num1*num2+num3+num4;} 83 else if((om1==2)&&(om2==0)&&(om3==1)) {answer=num1*num2+num3-num4;} 84 else if((om1==2)&&(om2==0)&&(om3==2)) {answer=num1*num2+num3*num4;} 85 else if((om1==2)&&(om2==0)&&(om3==3)) {answer=num1*num2+num3/num4;} 86 87 else if((om1==2)&&(om2==1)&&(om3==0)) {answer=num1*num2-num3+num4;} 88 else if((om1==2)&&(om2==1)&&(om3==1)) {answer=num1*num2-num3-num4;} 89 else if((om1==2)&&(om2==1)&&(om3==2)) {answer=num1*num2-num3*num4;} 90 else if((om1==2)&&(om2==1)&&(om3==3)) {answer=num1*num2-num3/num4;} 91 92 else if((om1==2)&&(om2==2)&&(om3==0)) {answer=num1*num2*num3+num4;} 93 else if((om1==2)&&(om2==2)&&(om3==1)) {answer=num1*num2*num3-num4;} 94 else if((om1==2)&&(om2==2)&&(om3==2)) {answer=num1*num2*num3*num4;} 95 else if((om1==2)&&(om2==2)&&(om3==3)) {answer=num1*num2*num3/num4;} 96 97 else if((om1==2)&&(om2==3)&&(om3==0)) {answer=num1*num2/num3+num4;} 98 else if((om1==2)&&(om2==3)&&(om3==1)) {answer=num1*num2/num3-num4;} 99 else if((om1==2)&&(om2==3)&&(om3==2)) {answer=num1*num2/num3*num4;} 100 else if((om1==2)&&(om2==3)&&(om3==3)) {answer=num1*num2/num3/num4;} 101 ///////////////// 102 else if((om1==3)&&(om2==0)&&(om3==0)) {answer=num1/num2+num3+num4;} 103 else if((om1==3)&&(om2==0)&&(om3==1)) {answer=num1/num2+num3-num4;} 104 else if((om1==3)&&(om2==0)&&(om3==2)) {answer=num1/num2+num3*num4;} 105 else if((om1==3)&&(om2==0)&&(om3==3)) {answer=num1/num2+num3/num4;} 106 107 else if((om1==3)&&(om2==1)&&(om3==0)) {answer=num1/num2-num3+num4;} 108 else if((om1==3)&&(om2==1)&&(om3==1)) {answer=num1/num2-num3-num4;} 109 else if((om1==3)&&(om2==1)&&(om3==2)) {answer=num1/num2-num3*num4;} 110 else if((om1==3)&&(om2==1)&&(om3==3)) {answer=num1/num2-num3/num4;} 111 112 else if((om1==3)&&(om2==2)&&(om3==0)) {answer=num1/num2*num3+num4;} 113 else if((om1==3)&&(om2==2)&&(om3==1)) {answer=num1/num2*num3-num4;} 114 else if((om1==3)&&(om2==2)&&(om3==2)) {answer=num1/num2*num3*num4;} 115 else if((om1==3)&&(om2==2)&&(om3==3)) {answer=num1/num2*num3/num4;} 116 117 else if((om1==3)&&(om2==3)&&(om3==0)) {answer=num1/num2/num3+num4;} 118 else if((om1==3)&&(om2==3)&&(om3==1)) {answer=num1/num2/num3-num4;} 119 else if((om1==3)&&(om2==3)&&(om3==2)) {answer=num1/num2/num3*num4;} 120 else {answer=num1/num2/num3/num4;} 121 // scanf("%c",&wenhao); 122 123 scanf("%lf",&youranswer); 124 if(answer==youranswer) 125 { 126 printf("回答正确。 "); 127 m++; 128 } 129 else 130 printf("回答错误，正确答案是%0.3f。 ",answer); 131 } 132 printf("总共%0.0f道题，你答对%d道题。",n,m); 133 } 134 135 }