toclly toclly
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C语言画圆问题。怎么跳过画图界面直接出来了? 这里是用三角函数画圆的。代码如下: #include <stdio.h> #include <conio.h> #include <graphics.h> #define WIDTH 250 #define HEIGHT 250 double page=180.00; double pi=3.14; int x; int y; int a, b, r, color, metric; void putPoints(int x, int y, int color) {      int xasp, yasp;      float aspectratio;      getaspectratio(&xasp, &yasp);      aspectratio=xasp/yasp;      putpixel(x+WIDTH, y*aspectratio+HEIGHT,color);      putpixel(y+WIDTH, x*aspectratio+HEIGHT,color);      putpixel(-y+WIDTH, x*aspectratio+HEIGHT,color);      putpixel(-x+WIDTH, y*aspectratio+HEIGHT,color);      putpixel(y+WIDTH, -x*aspectratio+HEIGHT,color);      putpixel(x+WIDTH, -y*aspectratio+HEIGHT,color);      putpixel(-x+WIDTH, -y*aspectratio+HEIGHT,color);      putpixel(-y+WIDTH, -x*aspectratio+HEIGHT,color);      putpixel(-y+WIDTH, -x*aspectratio+HEIGHT,color); } void funCircle(int r, int color) {      for(metric=0;metric<=90;metric++)      {          a=(int)(r*sin((double)metric/page*pi)+0.5);          b=(int)(r*cos((double)metric/page*pi)+0.5);          putPoints(a, b, color);      } } void main() {      int graphdriver, graphmode, errorcode;      printf("Please input R!\n\tR: ");      scanf("%d", &r);      printf("Please input COLOR!\n\tCOLOR: ");      scanf("%d", &color);      graphdriver=DETECT;      graphmode=0;      initgraph(&graphdriver, &graphmode, "D:\\WINYES\\TC20H\\BGI");      errorcode = graphresult();      if (errorcode != grOk)      {          printf("Graphics error:%s\n", grapherrormsg(errorcode));          printf("Press any key to halt:");          getch();          exit(1);      }      cleardevice();      funCircle(r, color);      getch();      closegraph(); } ------------------------------------------------------ 哪位高手知道问题在哪?感谢!
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