C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(8)
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1. gcvtº¯Êý
gcvtº¯ÊýµÄ¹¦ÄÜÊǰѸ¡µãÊýת»»³É×Ö·û´®£¬ÆäÓ÷¨ÊÇ£ºchar *gcvt(double value, int ndigit, char *buf);³ÌÐòÀý×ÓÈçÏ£º
#include <stdlib.h>
#include <stdio.h>
int main(void)
{
char str[25];
double num;
int sig = 5; /* significant digits */
/* a regular number */
num = 9.876;
gcvt(num, sig, str);
printf("string = %s\n", str);
/* a negative number */
num = -123.4567;
gcvt(num, sig, str);
printf("string = %s\n", str);
/* scientific notation */
num = 0.678e5;
gcvt(num, sig, str);
printf("string = %s\n", str);
return(0);
}
2. getcrº¯Êý
getcrº¯ÊýµÄ¹¦ÄÜÊÇ´ÓÁ÷ÖÐÈ¡×Ö·û£¬ÆäÓ÷¨ÊÇ£ºint getc(FILE *stream); ³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
int main(void)
{
char ch;
printf("Input a character:");
/* read a character from the
standard input stream */
ch = getc(stdin);
printf("The character input was: '%c'\n",
ch);
return 0;
}
3. getftimeº¯Êý
getftimeº¯ÊýµÄ¹¦ÄÜÊÇÈ¡ÎļþÈÕÆÚºÍʱ¼ä£¬ÆäÓ÷¨ÊÇ£ºint getftime(int handle, struct ftime *ftimep);³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
#include <io.h>
int main(void)
{
FILE *stream;
struct ftime ft;
if ((stream = fopen("TEST.$$$",
"wt")) == NULL)
{
fprintf(stderr,
&nbs
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extern "C" {
#endif
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#ifdef __cplusplus
}
#endif
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1. fgetcº¯Êý
fgetcº¯ÊýµÄ¹¦ÄÜÊÇ´ÓÁ÷ÖжÁÈ¡×Ö·û£¬ÆäÓ÷¨ÊÇ£ºint fgetc(FILE *stream); ³ÌÐòÀý×ÓÈçÏ£º
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