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½ñÌì¿´µ½javaÓÃthis¹Ø¼ü×ÖÀ´ÖØÔع¹Ôì·½·¨£¬ÔÚÕâÀï×ö¸ö±Ê¼Çclass a_sample{
public int x,y.z;
a_sample(int x){
this.x=x;
}
a_sample(int x,int y){
this(x);
this.y=y;
}
a_sample(int x,int y,int z){
this(x);
this(y);
this.z=z;
}
}
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¶¯Ì¬¿âÎļþÉú³É¶¯Ì¬¿â gcc -shared hello.c -o libhello.so
Ö÷ÎļþµÄ±àÒë             gcc main.c -lhello -L. -o main
(ÓÃcygwin .dll£¬main.c hello.hÊÇÔÚͬһĿ¼ÏÂ-LÊÇ·¾¶)
sqliteº¯Êý
sqlite3_exec(
    sqlite3 *,
    const char *,
    int (*callback)(void*,int,char**,char**),
    char **error_msg
)
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