| C语言库函数(C类字母) |
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| 作者:未知 文章来源:网络收集 点击数: 更新时间:2006-3-29 15:22:24
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/* close the file */ close(handle); return 0; }
函数名: circle 功 能: 在给定半径以(x, y)为圆心画圆 用 法: void far circle(int x, int y, int radius); 程序例:
#include #include #include #include
int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int midx, midy; int radius = 100;
/* initialize graphics and local variables */ initgraph(&gdriver, &gmode, "");
/* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ }
midx = getmaxx() / 2; midy = getmaxy() / 2; setcolor(getmaxcolor());
/* draw the circle */ circle(midx, midy, radius);
/* clean up */ getch(); closegraph(); return 0; }
函数名: cleardevice 功 能: 清除图形屏幕 用 法: void far cleardevice(void); 程序例:
#include #include #include #include
int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int midx, midy;
/* initialize graphics and local variables */ initgraph(&gdriver, &gmode, "");
/* read result of initialization */ errorcode = graphresult(); if (errorcode != grOk) /* an error occurred */ { printf("Graphics error: %s\n", grapherrormsg(errorcode)); printf("Press any key to halt:"); getch(); exit(1); /* terminate with an error code */ }
midx = getmaxx() / 2; midy = getmaxy() / 2; setcolor(getmaxcolor());
/* for centering screen messages */ settextjustify(CENTER_TEXT, CENTER_TEXT);
/* output a message to the 上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] 下一页
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