C语言的函数!

内财数模协会 · 发表于 2004-5-10 16:40:15

<

>函数名: settextstyle
功能: 为图形输出设置当前的文本属性
用法: void far settextstyle (int font, int direction, char size);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>/* the names of the text styles supported */
char *fname[] = { "DEFAULT font",
 "TRIPLEX font",
 "SMALL font",
 "SANS SERIF font",
 "GOTHIC font"
 }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int style, midx, midy;
int size = 1; /* 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; settextjustify(CENTER_TEXT, CENTER_TEXT); /* loop through the available text styles */
for (style=DEFAULT_FONT; style<=GOTHIC_FONT; style++)
{
 cleardevice();
 if (style == TRIPLEX_FONT)
 size = 4; /* select the text style */
 settextstyle(style, HORIZ_DIR, size); /* output a message */
 outtextxy(midx, midy, fname[style]);
 getch();
} /* clean up */
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:40:28

<

>函数名: settextstyle
功能: 为图形输出设置当前的文本属性
用法: void far settextstyle (int font, int direction, char size);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>/* the names of the text styles supported */
char *fname[] = { "DEFAULT font",
 "TRIPLEX font",
 "SMALL font",
 "SANS SERIF font",
 "GOTHIC font"
 }; int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int style, midx, midy;
int size = 1; /* 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; settextjustify(CENTER_TEXT, CENTER_TEXT); /* loop through the available text styles */
for (style=DEFAULT_FONT; style<=GOTHIC_FONT; style++)
{
 cleardevice();
 if (style == TRIPLEX_FONT)
 size = 4; /* select the text style */
 settextstyle(style, HORIZ_DIR, size); /* output a message */
 outtextxy(midx, midy, fname[style]);
 getch();
} /* clean up */
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:40:59

<

>函数名: settime
功能: 设置系统时间
用法: void settime(struct time *timep);
程序例: <

>#include <stdio.h>
#include <dos.h> <

>int main(void)
{
struct time t; gettime(&t);
printf("The current minute is: %d\n", t.ti_min);
printf("The current hour is: %d\n", t.ti_hour);
printf("The current hundredth of a second is: %d\n", t.ti_hund);
printf("The current second is: %d\n", t.ti_sec); /* Add one to the minutes struct element and then call settime */
t.ti_min++;
settime(&t); return 0;
}

内财数模协会 · 发表于 2004-5-10 16:41:13

<

>函数名: setusercharsize
功能: 为矢量字体改变字符宽度和高度
用法: void far setusercharsize(int multx, int dirx, int multy, int diry);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main(void)
{
/* request autodetection */
int gdriver = DETECT, gmode, errorcode; /* 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 */
} /* select a text style */
settextstyle(TRIPLEX_FONT, HORIZ_DIR, 4); /* move to the text starting position */
moveto(0, getmaxy() / 2); /* output some normal text */
outtext("Norm "); /* make the text 1/3 the normal width */
setusercharsize(1, 3, 1, 1);
outtext("Short "); /* make the text 3 times normal width */
setusercharsize(3, 1, 1, 1);
outtext("Wide"); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:41:23

<

>函数名: setvbuf
功能: 把缓冲区与流相关
用法: int setvbuf(FILE *stream, char *buf, int type, unsigned size);
程序例: <

>#include <stdio.h> <

>int main(void)
{
FILE *input, *output;
char bufr[512]; input = fopen("file.in", "r+b");
output = fopen("file.out", "w"); /* set up input stream for minimal disk access,
 using our own character buffer */
if (setvbuf(input, bufr, _IOFBF, 512) != 0)
 printf("failed to set up buffer for input file\n");
else
 printf("buffer set up for input file\n"); /* set up output stream for line buffering using space that
 will be obtained through an indirect call to malloc */
if (setvbuf(output, NULL, _IOLBF, 132) != 0)
 printf("failed to set up buffer for output file\n");
else
 printf("buffer set up for output file\n"); /* perform file I/O here */ /* close files */
fclose(input);
fclose(output);
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:41:38

<

>函数名: setvect
功能: 设置中断矢量入口
用法: void setvect(int intr_num, void interrupt(*isr)());
程序例: <

>/***NOTE:
This is an interrupt service routine. You can NOT compile this
program with Test Stack Overflow turned on and get an executable
file which will operate correctly. */ <

>#include <stdio.h>
#include <dos.h>
#include <conio.h> #define INTR 0X1C /* The clock tick interrupt */ void interrupt ( *oldhandler)(void); int count=0; void interrupt handler(void)
{
/* increase the global counter */
count++; /* call the old routine */
oldhandler();
} int main(void)
{
/* save the old interrupt vector */
oldhandler = getvect(INTR); /* install the new interrupt handler */
setvect(INTR, handler); /* loop until the counter exceeds 20 */
while (count < 20)
printf("count is %d\n",count); /* reset the old interrupt handler */
setvect(INTR, oldhandler); return 0;
}

内财数模协会 · 发表于 2004-5-10 16:41:50

<

>函数名: setverify
功能: 设置验证状态
用法: void setverify(int value);
程序例: <

>#include <stdio.h>
#include <conio.h>
#include <dos.h> <

>int main(void)
{
int verify_flag; printf("Enter 0 to set verify flag off\n");
printf("Enter 1 to set verify flag on\n"); verify_flag = getch() - 0; setverify(verify_flag); if (getverify())
 printf("DOS verify flag is on\n");
else
 printf("DOS verify flag is off\n"); return 0;
}

内财数模协会 · 发表于 2004-5-10 16:42:02

<

>函数名: setviewport
功 能: 为图形输出设置当前视口
用 法: void far setviewport(int left, int top, int right,
 int bottom, int clipflag);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>#define CLIP_ON 1 /* activates clipping in viewport */ int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode; /* 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 */
} setcolor(getmaxcolor()); /* message in default full-screen viewport */
outtextxy(0, 0, "* <-- (0, 0) in default viewport"); /* create a smaller viewport */
setviewport(50, 50, getmaxx()-50, getmaxy()-50, CLIP_ON); /* display some text */
outtextxy(0, 0, "* <-- (0, 0) in smaller viewport"); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:42:13

<

>函数名: setvisualpage
功能: 设置可见图形页号
用法: void far setvisualpage(int pagenum);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main(void)
{
/* select a driver and mode that supports */
/* multiple pages. */
int gdriver = EGA, gmode = EGAHI, errorcode;
int x, y, ht; /* 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 */
} x = getmaxx() / 2;
y = getmaxy() / 2;
ht = textheight("W"); /* select the off screen page for drawing */
setactivepage(1); /* draw a line on page #1 */
line(0, 0, getmaxx(), getmaxy()); /* output a message on page #1 */
settextjustify(CENTER_TEXT, CENTER_TEXT);
outtextxy(x, y, "This is page #1:");
outtextxy(x, y+ht, "Press any key to halt:"); /* select drawing to page #0 */
setactivepage(0); /* output a message on page #0 */
outtextxy(x, y, "This is page #0.");
outtextxy(x, y+ht, "Press any key to view page #1:");
getch(); /* select page #1 as the visible page */
setvisualpage(1); /* clean up */
getch();
closegraph();
return 0;
}

内财数模协会 · 发表于 2004-5-10 16:42:24

<

>函数名: setwritemode
功能: 设置图形方式下画线的输出模式
用法: void far setwritemode(int mode);
程序例: <

>#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h> <

>int main()
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int xmax, ymax; /* 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 */
} xmax = getmaxx();
ymax = getmaxy(); /* select XOR drawing mode */
setwritemode(XOR_PUT); /* draw a line */
line(0, 0, xmax, ymax);
getch(); /* erase the line by drawing over it */
line(0, 0, xmax, ymax);
getch(); /* select overwrite drawing mode */
setwritemode(COPY_PUT); /* draw a line */
line(0, 0, xmax, ymax); /* clean up */
getch();
closegraph();
return 0;
}

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