C语言必背个程序+例--语法高亮.doc

C语言必背18个经典程序 输入什么显示什么 main() { int c; c = getchar(); while (c != EOF) { putchar(c); c = getchar(); } } 可以在Win-tc下编译通过 C语言精彩作图之一颗三维的心 /* Heart */ #include graphics.h #include math.h #define PI 3.1415926 void main() { double a; int x,y,y1,r,r1; int gdriver=DETECT,gmode; initgraph(gdriver,gmode,c:\\tc); printf(Please input Radus(80): ); scanf(%d,r); cleardevice(); setbkcolor(9); setcolor(4); outtextxy(80,20,This program show the Heart picture.); y1=240-r; for(a=0;a=2*PI;a+=PI/27) { x=320+r*cos(a); y=240+r*sin(a); r1=sqrt((x-320)*(x-320)+(y-y1)*(y-y1)); circle(x,y,r1); } outtextxy(80,460,Press any key to quit...); getch(); closegraph(); } 用C语言显示BMP图形 #include stdio.h #include dir.h #include dos.h #include graphics.h char *malloc();/*malloc转换*/ char bmp_to_dat(char *bmp,char *dat) /*将16色BMP文件转换为可以用putimage输出的格式，bmp为原BMP文件，dat为转化文件*/ { unsigned char c[8],scan_times,scan_pixs; unsigned char workpos;int i,j,k,n,nowpos,iw,ih; static int color[16]={0,4,2,6,1,5,3,7,8,12,10,14,9,13,11,15}; unsigned char workline[640],scanline[640]; FILE *fp,*targetfp; union { unsigned char value; struct { unsigned cl:4; unsigned ch:4; }color; }mycolor; if((fp=fopen(bmp,rb))==NULL)return(0); targetfp=fopen(dat,wb); fseek(fp,18,SEEK_SET); iw=0;ih=0; fread(iw,4,1,fp); /*读图像宽度*/ fread(ih,4,1,fp); /*读图像高度*/ if(iw==0ih==0iw640ih480) {fclose(fp);fclose(targetfp);return(0);} iw--;ih--; /*∵putimage中的长宽比实际数值少1*/ scan_times=iw/8+1; /*行处理单位数*/ scan_pixs=scan_times*4; /*行像素字节数∵1单位=4字节*/ fputc(iw%256,targetfp); /*填充信息头：长、宽部分*/ fputc(iw/256,targetfp); fputc(ih%256,targetfp); fputc(ih/256,targetfp); fseek(fp,-scan_pixs,SEEK_END)