#include <stdio.h>
#include <stdlib.h>
#include<math.h>
#define i 1e-6
#define e 3.1415926
void xiaoquan(float data1,float data2,char op);
void weijia(double d,char t[]);


main()                  /*这是一个用于简单计算的计算器*/
{
     char judge1,judge2;
 
 float data1,data2;
 char op;

 char t[3];
 double d,a,b,c;
 

 do
 {
do
{
printf("该运算涉及三角函数吗(y/n)?:\n");   /*判断是否包含三角函数y/n*/
scanf(" %c",&judge1);

 if(judge1=='n'||judge1=='N')
 {
   printf("请输入计算表达式:\n");
    scanf("%f %c %f",&data1,&op,&data2);
printf("输入数是%f,%f\n输入符是%c\n",data1,data2,op);  
/*确定操作数与操作符*/
    xiaoquan(data1,data2,op);                /*调用樊炽权的部分*/         
 }

 
  else if(judge1=='y'||judge1=='Y')            /*包含三角函数的部分*/
 { 
    printf("请输入三角函数(后加空格或回车)和角度:"); 
scanf("%s%lf",t,&d);
printf("输入的三角函数是:%s\n",t);       /*确定操作数与操作符*/
    printf("角度是:%.2f\n",d);
weijia(d,t);                             /*调用刘伟佳的部分*/
}

 else       /*当错误时做出的提醒*/
 {
printf("输入错误，请再次输入\n");
 }
 }while(judge1!='y'&&judge1!='Y'&&judge1!='n'&&judge1!='N');  
/*判断是否输入错误*/

      printf("continue(y/n)?\t");      /*判断用户是否想再次运算程序*/ 
      scanf(" %c",&judge2);
      printf("\n");
      printf("\n");
 }while (judge2=='Y'||judge2=='y');
system("pause");
}


void xiaoquan(float data1,float data2,char op)          
{
       int rem;
     switch(op)
  { 
   case'+':
     printf("%f+%f=%f\n",data1,data2,data1+data2);
           break;
   case'-':
     printf("%f-%f=%f\n",data1,data2,data1-data2);
           break;
   case'*':
     printf("%f*%f=%f\n",data1,data2,data1*data2);
           break;
   case'/':
     if(fabs(data2)<=i)
    printf("Division by zero!\n");
 else
    printf("%f/%f=%f\n",data1,data2,data1/data2);
           break;
 case'%':
    rem=(int)data1%(int)data2;
    printf("%d\n",rem);
           break;
   default:
    printf("Unknow operator!\n");
  }
}

/*函数功能：对数据进行普通运算
  函数入口参数：浮点型变量data1,data2
                字符型变量op
  函数返回值：无*/
void weijia(double d,char t[])
{
 double w,a,b,c;
    
    w=(d*e)/180;
    a=sin(w);
printf("sin%.2f=%.2f\n",d,a);
    b=cos(w);
printf("cos%.2f=%.2f\n",d,b);
    c=a/b;
printf("tan%.2f=%.2f\n",d,c); 
}

/*函数功能：计算三角函数的复杂运算
  函数参数：双精度变量d，存储角度
            字符串数组t
  函数返回值：无