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#include <ctype.h>
int isspace ( int c );
http://www.cplusplus.com/reference/clibrary/cctype/isspace/
Checks if parameter c is a white-space character.For the purpose of this function, standard white-space characters are:
' '
(0x20)
space (SPC)
'\t'
(0x09)
horizontal tab (TAB)
'\n'
(0x0a)
newline (LF)
'\v'
(0x0b)
vertical tab (VT)
'\f'
(0x0c)
feed (FF)
'\r'
(0x0d)
carriage return (CR)
 /* isspace example */
#include <stdio.h>
#include <ctype.h>
int main ()
{
int c;
int i=0;
char str[]="Example sentence to test isspace\n";
while (str[i])
{
c=str[i];
if (isspace(c)) c='\n';
putchar (c);
i++;
}
return 0;
}

/*
This code prints out the C string character by character, replacing any white-space character by a newline character. Output:

Example
sentence
to
test
isspace
*/


memcpyʵÏÖ£º
char *strcpy(char *strDest, const char *strSrc){
assert((strDest!=NULL) && (strSrc !=NULL)); // 2·Ö
char *address = strDest; // 2·Ö
while( (*strDest++ = * strSrc++) != '\0' ) // 2·Ö
NULL ;
return address ; // 2·Ö
}


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