h1.c

sin数据生成

#include"stdio.h"
#include"math.h"
#define N 256
void main()
{
FILE *fp;
double y;
int n;
if((fp=fopen("sindata.txt","w"))==NULL)
   {printf("cannot open this file\n");
    exit(0);
   }
  fprintf(fp,"WIDTH=8;\n");
  fprintf(fp,"DEPTH=256;\n");
  fprintf(fp,"ADDRESS_RADIX=DEC;\n");
  fprintf(fp,"DATA_RADIX=DEC;\n");
  fprintf(fp,"CONTENT BEGIN\n");
  for(n=0;n<=N-1;n++)
   {y=127.5+127.5*sin(n*3.1415936535/128);
    if(fmod(n,8)==0)
      {fprintf(fp,"\n");}
    fprintf(fp,"%4d:%4.0f;\n",n,y);
   }
    fprintf(fp,"END;");
    fclose(fp);
}