HDU 1062 Text Reverse

#include<stdio.h>
#include<string.h>
int n,c;
char str[1005],ch[1005][1005];
void sort(  )
{
int i = 0;
while( str[i] )
{
int j = 0;
while( str[i] == ' ' )
ch[c][j++] = str[i++];
ch[c][j] = 0;
++c;
j = 0;
while( str[i] && str[i] != ' ' )
ch[c][j++] = str[i++];
ch[c][j] = 0;
++c;
}
}
void change(  )
{
for( int i = 0; i < c; ++i )
{
int len = strlen( ch[i] );
for( int p = len - 1, q = 0; p > q; --p,++q )
{
char s = ch[i][p];
ch[i][p] = ch[i][q];
ch[i][q] = s;
}
printf( "%s",ch[i] );
}
}
int main( )
{
scanf( "%d%*c",&n );
while( n-- )
{
c = 0;
gets( str );
sort(  );
change(  );
puts( "" );
}
return 0;
}