_itoa
位于stdlib中。
#include <stdlib.h>
#include <stdio.h>
void main( void )
{
char buffer[20];
int i = 0x223;
_itoa(i, buffer, 10);
puts(buffer);
_itoa(i, buffer, 16);
printf("0x%s/n", buffer);
getchar();
}
// 547
// 0x223
scanf, scanf_s
fscanf, fscanf_s
前者直接输入，后者需要指定长度
http://topic.csdn.net/u/20110609/20/61e146fb-3d92-43ee-a017-00080e74cd04.html?seed=2003693757&r=73768052#r_73768052
函数的格式控制：
http://hi.baidu.com/vhou/blog/item/a6c4c4b07139e7530923022b.html
long int strtol ( const char * str, char ** endptr, int base );
Convert string to long integer
string.h/cstring Functions
Copying:
memcpyCopy block of memory (function)
memmoveMove block of memory (function)
strcpyCopy string (function)
strncpyCopy characters from string (function)
Concatenation:
strcatConcatenate strings (function)
strncatAppend characters from string (function)
Comparison:
memcmpCompare two blocks of memory (function)
strcmpCompare two strings (function)
strcollCompare two strings using locale (function)
strncmpCompare characters of two strings (function)
strxfrmTransform string using locale (function)
Searching:
memchrLocate character in block of memory (function)
strchrLocate first occurrence of character in string (function)
strcspnGet span until character in string (function)
strpbrkLocate character in string (function)
strrchrLocate last occurrence of character in string (function)
strspnGet span of character set in string (function)
strstrLocate substring (function)
strtokSplit string into tokens (function)
Other:
memsetFill block of memory (function)
strerrorGet pointer to error message string (function)
strlenGet string length (function)
