| C语言库函数(F类字母) |
|
| 作者:未知 文章来源:网络收集 点击数: 更新时间:2006-3-29 15:22:22
|
函数名: fabs 功 能: 返回浮点数的绝对值 用 法: double fabs(double x); 程序例: #include #include
int main(void) { float number = -1234.0;
printf("number: %f absolute value: %f\n", number, fabs(number)); return 0; }
函数名: farcalloc 功 能: 从远堆栈中申请空间 用 法: void far *farcalloc(unsigned long units, unsigned ling unitsz); 程序例: #include #include #include #include
int main(void) { char far *fptr; char *str = "Hello";
/* allocate memory for the far pointer */ fptr = farcalloc(10, sizeof(char));
/* copy "Hello" into allocated memory */ /* Note: movedata is used because you might be in a small data model, in which case a normal string copy routine can not be used since it assumes the pointer size is near. */ movedata(FP_SEG(str), FP_OFF(str), FP_SEG(fptr), FP_OFF(fptr), strlen(str));
/* display string (note the F modifier) */ printf("Far string is: %Fs\n", fptr);
/* free the memory */ farfree(fptr);
return 0; }
函数名: farcoreleft 功 能: 返回远堆中未作用存储区大小 用 法: long farcoreleft(void); 程序例:
#include #include
int main(void) { printf("The difference between the\ highest allocated block in the\ far\n"); printf("heap and the top of the far heap\ is: %lu bytes\n", farcoreleft());
return 0; }
函数名: farfree 功 能: 从远堆中释放一块 用 法: void farfree(void); 程序例:
#include #include #include #include
int main(void) { char far *fptr; char *str = "Hello";
/* allocate memory for the far pointer */ fptr = farcalloc(10, sizeof(char));
/* copy "Hello" into allocated memory */ /* Note: movedata is used because[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] ... 下一页 >>
|
|
[ 收藏此页到: 天天|和讯|博采|ViVi|狐摘|我摘|天极 ] 文章录入:kinda 责任编辑:kinda |
|
上一篇文章: 端口到进程实现的源代码 下一篇文章: 病毒制作初步 |
| 【字体:小 大】【发表评论】【加入收藏】【告诉好友】【打印此文】【关闭窗口】 |