| C语言库函数(A类字母) |
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| 作者:未知 文章来源:网络收集 点击数: 更新时间:2006-3-29 15:22:23
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printf("The arc cosine of %lf is %lf\n", x, result); return 0; }
函数名: allocmem 功 能: 分配DOS存储段 用 法: int allocmem(unsigned size, unsigned *seg); 程序例: #include #include #include
int main(void) { unsigned int size, segp; int stat;
size = 64; /* (64 x 16) = 1024 bytes */ stat = allocmem(size, &segp); if (stat == -1) printf("Allocated memory at segment: %x\n", segp); else printf("Failed: maximum number of paragraphs available is %u\n", stat);
return 0; }
函数名: arc 功 能: 画一弧线 用 法: void far arc(int x, int y, int stangle, int endangle, int radius); 程序例: #include #include #include #include
int main(void) { /* request auto detection */ int gdriver = DETECT, gmode, errorcode; int midx, midy; int stangle = 45, endangle = 135; int radius = 100;
/* initialize graphics and local variables */ initgraph(&gdriver, &gmode, "");
/* read result of initialization */ errorcode = graphresult(); /* an error occurred */ if (errorcode != grOk) { 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; setcolor(getmaxcolor());
/* draw arc */ arc(midx, midy, stangle, endangle, radius);
/* clean up */ getch(); closegraph(); return 0; }
函数名: asctime 功 能: 转换日期和时间为ASCII码 用 法: char *asctime(const struct tm *tblock); 程序例: #include #include #include
int main(void) { struct tm t; char str[80];
/* sample loading of tm structure */
t.tm_sec = 1; /* Seconds */ t.tm_min = 30; /* 上一页 [1] [2] [3] [4] 下一页
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