寒假作业三

合作者：姚志辉：031602142；http://www.cnblogs.com/52wu244/
何宇恒：031692113；http://www.cnblogs.com/hyh1072797231/
总代码（失败了）：https://github.com/xiaozhirensan/object-oriented/tree/master
我的部分

void topic(int n,int randn[],int key[],char randc[])
{
	int caculate(char c,int a,int b);
	int i,j,a,b;
	char c[4]={'+','-','*','/'};
	srand((unsigned) time(NULL));
	for(i=0;i<n;)
	{
		for(j=0;j<4;j++)
			randn[j]=rand()%11;
		for(j=0;j<3;j++)
			randc[j]=c[rand()%4];
		if(randc[1]=='*'||randc[1]=='/')
		{
			if((randc[0]=='+'||randc[0]=='-')&&(randc[2]=='+'||randc[2]=='-'))
			{
				a=caculate(randc[0],randn[0],randn[1]);
				b=caculate(randc[2],randn[2],randn[3]);
				if(caculate(randc[1],a,b)!=-1)
				{
					printf("(%d%c%d)%c(%d%c%d)=?
",randn[0],randc[0],randn[1],randc[1],randn[2],randc[2],randn[3]);
					key[i]=caculate(randc[1],a,b);
					i++;
				}
				else{}
			}
			else if((randc[0]=='+'||randc[0]=='-')&&(randc[2]=='*'||randc[2]=='/'))
			{
				a=caculate(randc[0],randn[0],randn[1]);
				if(caculate(randc[1],a,randn[2])!=-1)
				{
					b=caculate(randc[1],a,randn[2]);
					if(caculate(randc[2],b,randn[3])!=-1)
					{
						printf("(%d%c%d)%c%d%c%d=?
",randn[0],randc[0],randn[1],randc[1],randn[2],randc[2],randn[3]);
						key[i]=caculate(randc[2],b,randn[3]);
						i++;
					}
					else {}
				}
				else {}
			}
			else if((randc[0]=='*'||randc[1]=='/')&&(randc[2]=='+'||randc[2]=='-'))
			{
				a=caculate(randc[2],randn[2],randn[3]);
				if(caculate(randc[0],randn[0],randn[1])!=-1)
				{
					b=caculate(randc[0],randn[0],randn[1]);
					if(caculate(randc[1],b,a)!=-1)
					{
						printf("%d%c%d%c(%d%c%d)=?
",randn[0],randc[0],randn[1],randc[1],randn[2],randc[2],randn[3]);
						key[i]=caculate(randc[1],b,a);
						i++;
					}
					else {}
				}
				else {}
			}
			else 
			{
				if(caculate(randc[0],randn[0],randn[1])!=-1)
				{
					a=caculate(randc[0],randn[0],randn[1]);
					if(caculate(randc[1],a,randn[2])!=-1)
					{
						b=caculate(randc[1],a,randn[2]);
						if(caculate(randc[2],b,randn[3])!=-1)
						{
							printf("%d%c%d%c%d%c%d=?
",randn[0],randc[0],randn[1],randc[1],randn[2],randc[2],randn[3]);
							key[i]=caculate(randc[2],b,randn[3]);
							i++;
						}
						else {}
					}
					else{}
				}
				else{}
			}
		}
		else
		{
			if(caculate(randc[0],randn[0],randn[1])!=-1&&caculate(randc[2],randn[2],randn[3])!=-1)
			{
				a=caculate(randc[0],randn[0],randn[1]);
				b=caculate(randc[2],randn[2],randn[3]);
				printf("%d%c%d%c%d%c%d=?
",randn[0],randc[0],randn[1],randc[1],randn[2],randc[2],randn[3]);
				key[i]=caculate(randc[1],a,b);
				i++;
			}
			else{}
		}
	}
}

思路：先随机出随机整数，根据中间符号字符是*÷还是+—分情况讨论，在相应的情况下加上括号（错误思路导致错误代码）
规范：含四位整数，括号随机的的，分四个模块

合作过程：主要在QQ上讨论，导致信息的延误，因为不能及时收到和回复，导致代码发现问题的滞后
合作体会：这次的失败体验刻骨铭心，以至于到最后有点怨天尤人，希望上课后可以找回自信