C语言函数大全(d开头)

函数名: delay

功能: 将程序的执行暂停一段时间(毫秒)

用法: void delay(unsigned milliseconds);

程序例:

/* Emits a 440-Hz tone for 500 milliseconds */
#include
int main(void)
{
sound(440);
delay(500);
nosound();
return 0;
}

函数名: delline

功能: 在文本窗口中删去一行

用法: void delline(void);

程序例:

#include
int main(void)
{
clrscr();
cprintf("The function DELLINE deletes \
the line containing the\r\n");
cprintf("cursor and moves all lines \
below it one line up.\r\n");
cprintf("DELLINE operates within the \
currently active text\r\n");
cprintf("window. Press any key to \
continue . . .");
gotoxy(1,2); /* Move the cursor to the
second line and first column */
getch();
delline();
getch();
return 0;
}

时间： 2024-10-04 14:47:57

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C语言函数大全(a开头)

函数名: abort 功能: 异常终止一个进程 用法: void abort(void); 程序例: #include #include int main(void) { printf("Calling abort()\n"); abort(); return 0; /* This is never reached */ } 函数名: abs 功能: 求整数的绝对值 用法: int abs(int i); 程序例: #include #include int main(void) {

C语言函数大全(b开头)

函数名: bar 功能: 画一个二维条形图 用法: void far bar(int left, int top, int right, int bottom); 程序例: #include #include #include #include int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int midx, midy, i; /* initialize graphics

C语言函数大全(c开头)

函数名: cabs 功能: 计算复数的绝对值 用法: double cabs(struct complex z); 程序例: #include #include int main(void) { struct complex z; double val; z.x = 2.0; z.y = 1.0; val = cabs(z); printf("The absolute value of %.2lfi %.2lfj is %.2lf", z.x, z.y, val); return 0;

C语言函数大全(e开头)

函数名: ecvt 功能: 把一个浮点数转换为字符串 用法: char ecvt(double value, int ndigit, int *decpt, int *sign); 程序例: #include #include #include int main(void) { char *string; double value; int dec, sign; int ndig = 10; clrscr(); value = 9.876; string = ecvt(value, ndig,

C语言函数大全(g开头)

函数名: gcvt 功能: 把浮点数转换成字符串 用法: char *gcvt(double value, int ndigit, char *buf); 程序例: #include #include int main(void) { char str[25]; double num; int sig = 5; /* significant digits */ /* a regular number */ num = 9.876; gcvt(num, sig, str); printf("str

C语言函数大全(h开头)

函数名: harderr 功能: 建立一个硬件错误处理程序 用法: void harderr(int (*fptr)()); 程序例: /*This program will trap disk errors and prompt the user for action. Try running it with no disk in drive A: to invoke its functions.*/ #include #include #include #define IGNORE 0 #d

C语言函数大全(i开头)

函数名: imagesize 功能: 返回保存位图像所需的字节数 用法: unsigned far imagesize(int left, int top, int right, int bottom); 程序例: #include #include #include #include #define ARROW_SIZE 10 void draw_arrow(int x, int y); int main(void) { /* request autodetection */ int gdri

C语言函数大全(k开头)

函数名: kbhit 功能: 检查当前按下的键 用法: int kbhit(void); 程序例: #include int main(void) { cprintf("Press any key to continue:"); while (!kbhit()) /* do nothing */ ; cprintf("\r\nA key was pressed...\r\n"); return 0; } 函数名: keep 功能: 退出并继续驻留 用法: void

C语言函数大全(l开头)

函数名: labs 用法: long labs(long n); 程序例: #include #include int main(void) { long result; long x = -12345678L; result= labs(x); printf("number: %ld abs value: %ld\n", x, result); return 0; } 函数名: ldexp 功能: 计算value*2的幂 用法: double ldexp(double value,