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)
{
int number = -1234;
printf("number: %d absolute value: %d\n", number, abs(number));
return 0;
}

函数名: absread, abswirte

功能: 绝对磁盘扇区读、写数据

用法: int absread(int drive, int nsects, int sectno, void *buffer);

int abswrite(int drive, int nsects, in tsectno, void *buffer);

程序例:

/* absread example */
#include
#include
#include
#include
int main(void)
{
int i, strt, ch_out, sector;
char buf[512];
printf("Insert a diskette into drive A and press any key\n");
getch();
sector = 0;
if (absread(0, 1, sector, &buf) != 0)
{
perror("Disk problem");
exit(1);
}
printf("Read OK\n");
strt = 3;
for (i=0; i<80; i++)
{
ch_out = buf[strt+i];
putchar(ch_out);
}
printf("\n");
return(0);
}