Use the symbol table in VxWorks to save your own stuff

Today, I turned to elder brother Chen's book, which mentioned the use of symbols table to store their own things, try a bit:
int i=0;
Char c[5]={97,98,99,100,0};
Char c1[5];

Myst=symtblcreate (200,true,memsyspartid);
for (i=0;i<10;i++)
{
C[1]+=1;
Symadd (myst,c,c,sym_global| SYM_DATA,100);
}
c[1]=98;
for (i=0;i<10;i++)
{
C[1]+=1;
Symfindbyname (Myst,c, (char * *) c1,null);
printf ("/n%s/n", &c1[8]);
}
Do not know why Symfindbyname retrieved the address of the first eight bytes is some do not know what the meaning of the data,
The Nineth start is the value