实现sin(x)曲线与cos(x)曲线图形的同时显示

#include <cstdio>
#include <cmath>

#define PAI 32
#define AMP 10

int
main(void)
{
    int    layer;
    double y;      //ordinate of current layer
    int    x;      //abscissa of current layer
    int    m;      //abscissa of cos(x)
    int    n;      //abscissa of sin(x)

    for(layer=0;layer<=20;++layer)
    {
        y=0.1*layer;
        m=(int)(acos(1-y)*AMP);
        n=(int)(asin(1-y)*AMP);

        for(x=0;x<2*PAI;++x)
        {
            if((x==m && x==n)||(x==2*PAI-m && x==PAI-n)) printf("+"); //cross pointer
            else if(x==n||x==PAI-n||x==n+2*PAI)          printf("+"); //on sin(x)
            else if(x==m||x==2*PAI-m)                    printf("*"); //on cos(x)
            else                                         printf(" "); //blank
        }
                                                         printf("\n");//next line
    }

    return 0;
}

 

 

Output:

*              + +                                              
    *      +         +                                      *   
      *  +             +                                  *     
       +                 +                               *      
      +  *                +                            *        
     +    *                +                          *         
    +      *                +                        *          
   +        *                +                      *           
  +          *                +                    *            
 +            *                +                  *             
+              *                +                *              
                *                +              *              +
                 *                +            *              + 
                  *                +          *              +  
                   *                +        *              +   
                    *                +      *              +    
                      *               +   *               +     
                       *               + *               +      
                        *               *+             +        
                          *           *    +         +          
                               * *             + +