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c语言390,c语言39个关键字

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我在淘宝上看的二手笔记本电脑才390,我想买个学习c语言,用来写代码,不知道这么便宜敢买吗???

你要是敢买,我第一个服你!

千万别买,这水深得很。

多花一点钱,两三千的电脑写代码是没什么问题的,但是也不至于便宜到390。

兄弟,那不是便宜,那是一个坑啊

C语言出错图形模式下显示字符

#include"graphics.h"

main()

{

int drive,mode;

drive=DETECT;//大写 必须大写

initgraph(drive,mode,"c:\\tc30\\bgi");

cleardevice();

setcolor(12);

circle(320,380,50);

setfillstyle(SOLID_FILL,LIGHTRED);//大写

floodfill(320,375,12);

setkcolor(7);

setfillstyle(SOLID_FILL,GREEN);//大写

bar(0,380,639,479);

setcolor(14);

line(0,380,639,380);

line(0,390,639,390);

line(0,410,639,410);

line(0,440,639,440);

line(0,479,639,479);

line(0,400,60,380);

line(0,430,130,380);

line(0,479,200,380);

line(120,479,245,380);

line(210,479,280,380);

line(280,479,310,380);

line(360,479,330,380);

line(430,479,360,380);

line(520,479,395,380);

line(639,479,450,380);

line(639,430,520,380);

line(639,400,590,380);

settextstyle(1,0,4);

moveto(100,150);

outtext("press any key to continue...");

getch();

closegraph();

}

【c语言】学到指针。。跟着书本输入,可还是出现问题。。。错误代码:无法识别的声明。

if(*buffer_length)这里错,buffer_length是个整形,不能取*操作

另外,以后提这种问题,如果不能贴完整代码,拜托把行号显示出来

你这次是39行,要是390行,估计没有人会帮你看的。

c语言中的时钟问题

#include"stdio.h"

#include"graphics.h"

#include"math.h"

#include"time.h"

#include"dos.h"

int point_sec,point_min,point_hour;

int x,y,z;

int array_sec[60][2];

int array_min[60][2];

int array_hour[60][2];

int a[60][2];

void zhongmian()

{

int n,m,p;

x=320;

y=240;

z=140;

point_sec=132;

point_min=110;

point_hour=90;

setfillstyle(1,2);

setlinestyle(0,0,3);

ellipse(x,y,0,180,220,150);

setlinestyle(0,0,3);

ellipse(x,y,180,360,220,150);

ellipse(x,y,90,270,210,150);

ellipse(x,y,90,270,200,150);

ellipse(x,y,90,270,190,150);

ellipse(x,y,90,270,180,150);

ellipse(x,y,90,270,170,150);

ellipse(x,y,90,270,160,150);

ellipse(x,y,90,270,150,150);

ellipse(x,y,270,90,150,150);

ellipse(x,y,270,90,160,150);

ellipse(x,y,270,90,170,150);

ellipse(x,y,270,90,180,150);

ellipse(x,y,270,90,190,150);

ellipse(x,y,270,90,200,150);

ellipse(x,y,270,90,210,150);

setcolor(3);

ellipse(x,80,25,155,72,72);

ellipse(x,80,40,140,55,55);

setcolor(RED);

circle(x,y,148);

floodfill(165,240,RED);

floodfill(145,240,RED);

floodfill(125,240,RED);

floodfill(105,240,RED);

floodfill(475,240,RED);

floodfill(495,240,RED);

floodfill(515,240,RED);

floodfill(535,240,RED);

setlinestyle(0,0,3);

line(135,320,90,420);

line(505,320,550,420);

line(90,420,550,420);

arc(x,y,26,154,200);

setcolor(YELLOW);

arc(x,y,32,147,192);

setcolor(YELLOW);

setfillstyle(1,1);

floodfill(250,400,RED);

putpixel(320,100,YELLOW);

fillellipse(320,100,5,5);

putpixel(390,119,YELLOW);

fillellipse(390,119,5,5);

putpixel(441,170,YELLOW);

fillellipse(441,170,5,5);

putpixel(460,240,YELLOW);

fillellipse(460,240,5,5);

putpixel(441,310,YELLOW);

fillellipse(441,310,5,5);

putpixel(390,361,YELLOW);

fillellipse(390,361,5,5);

putpixel(320,380,YELLOW);

fillellipse(320,380,5,5);

putpixel(250,361,YELLOW);

fillellipse(250,361,5,5);;

putpixel(199,310,YELLOW);

fillellipse(199,310,5,5);

putpixel(180,240,YELLOW);

fillellipse(180,240,5,5);;

putpixel(199,170,YELLOW);

fillellipse(199,170,5,5);;

putpixel(250,119,YELLOW);

fillellipse(250,119,5,5);;

for(p=6,n=0,m=0;n15;p=p+6,n++,m++){

a[m][0]=(int)(x+z*sin(2*3.14*p/360));

a[m][1]=(int)(y-z*cos(2*3.14*p/360));

array_sec[m][0]=(int)(x+point_sec*sin(2*3.14*p/360));

array_sec[m][1]=(int)(y-point_sec*cos(2*3.14*p/360));

array_min[m][0]=(int)(x+point_min*sin(2*3.14*p/360));

array_min[m][1]=(int)(y-point_min*cos(2*3.14*p/360));

array_hour[m][0]=(int)(x+point_hour*sin(2*3.14*p/360));

array_hour[m][1]=(int)(y-point_hour*cos(2*3.14*p/360));

}

for(p=6,n=0;n15;p=p+6,n++,m++){

a[m][0]=(int)(x+z*cos(2*3.14*p/360));

a[m][1]=(int)(y+z*sin(2*3.14*p/360));

array_sec[m][0]=(int)(x+point_sec*cos(2*3.14*p/360));

array_sec[m][1]=(int)(y+point_sec*sin(2*3.14*p/360));

array_min[m][0]=(int)(x+point_min*cos(2*3.14*p/360));

array_min[m][1]=(int)(y+point_min*sin(2*3.14*p/360));

array_hour[m][0]=(int)(x+point_hour*cos(2*3.14*p/360));

array_hour[m][1]=(int)(y+point_hour*sin(2*3.14*p/360));

}

for(p=6,n=0;n15;p=p+6,n++,m++){

a[m][0]=(int)(x-z*sin(2*3.14*p/360));

a[m][1]=(int)(y+z*cos(2*3.14*p/360));

array_sec[m][0]=(int)(x-point_sec*sin(2*3.14*p/360));

array_sec[m][1]=(int)(y+point_sec*cos(2*3.14*p/360));

array_min[m][0]=(int)(x-point_min*sin(2*3.14*p/360));

array_min[m][1]=(int)(y+point_min*cos(2*3.14*p/360));

array_hour[m][0]=(int)(x-point_hour*sin(2*3.14*p/360));

array_hour[m][1]=(int)(y+point_hour*cos(2*3.14*p/360));

}

for(p=6,n=0;n15;p=p+6,n++,m++){

a[m][0]=(int)(x-z*cos(2*3.14*p/360));

a[m][1]=(int)(y-z*sin(2*3.14*p/360));

array_sec[m][0]=(int)(x-point_sec*cos(2*3.14*p/360));

array_sec[m][1]=(int)(y-point_sec*sin(2*3.14*p/360));

array_min[m][0]=(int)(x-point_min*cos(2*3.14*p/360));

array_min[m][1]=(int)(y-point_min*sin(2*3.14*p/360));

array_hour[m][0]=(int)(x-point_hour*cos(2*3.14*p/360));

array_hour[m][1]=(int)(y-point_hour*sin(2*3.14*p/360));

}

for(n=0;n60;n++)

putpixel(a[n][0],a[n][1],YELLOW);

}

void zhuandong()

{

struct tm * p;

time_t l;

int n,m,i,q,b,c,sec,min,hour;

n=61;

m=61;

i=61;

b=0;

c=0;

while(1){

l=time(NULL);

p=localtime(l);

sec=p-tm_sec;

min=p-tm_min;

hour=p-tm_hour;

gotoxy(29,12);

if(n==sec){

setcolor(0);

setlinestyle(0,0,1);

line(x,y,array_sec[(sec+58)%60][0],array_sec[(sec+58)%60][1]);

setlinestyle(0,0,2);

line(x,y,array_min[(min+58)%60][0],array_min[(min+58)%60][1]);

setlinestyle(0,0,3);

line(x,y,array_hour[(hour%12*5+min/12+58)%60][0],array_hour[(hour%12*5+min/12+58)%60][1]);

setcolor(YELLOW);

setlinestyle(0,0,3);

line(x,y,array_hour[(hour%12*5+min/12+59)%60][0],array_hour[(hour%12*5+min/12+59)%60][1]);

setlinestyle(0,0,2);

line(x,y,array_min[(min+59)%60][0],array_min[(min+59)%60][1]);

printf("%s",asctime(p));

sound(50);

delay(100);

nosound();

setcolor(YELLOW);

setlinestyle(0,0,1);

line(320,240,array_sec[(sec+59)%60][0],array_sec[(sec+59)%60][1]);

}

n=sec+1;

if(n==60)n=0;

if(b==0)

{m=min;b=1;}

if(min==m){

setcolor(0);

setcolor(YELLOW);

setlinestyle(0,0,3);

line(x,y,array_hour[(hour%12*5+min/12+59)%60][0],array_hour[(hour%12*5+min/12+59)%60][1]);

setlinestyle(0,0,2);

line(x,y,array_min[(min+59)%60][0],array_min[(min+59)%60][1]);

}

m=min+1;

if(m==60)m=0;

if(c==0)

{i=min;c=1;}

if(i==min){

setcolor(0);

setcolor(YELLOW);

setlinestyle(0,0,3);

line(x,y,array_hour[(hour%12*5+min/12+59)%60][0],array_hour[(hour%12*5+min/12+59)%60][1]);

}

i=min+1;

if(i==60)i=0;

if(kbhit())exit(1);

}

}

main()

{

int gdriver,mode;

gdriver=VGA;

mode=VGAHI;

registerbgidriver(EGAVGA_driver);

initgraph(gdriver,mode,"");

setbkcolor(0);

setcolor(RED);

zhongmian();

zhuandong();

closegraph();

}