everest% CC -c pmain2.C
"pmain2.C", line 21: error(1020): identifier "printf" is undefined
     printf("store p1 in p2, r=%d\n", r) ;
     ^

"pmain2.C", line 25: error(1238): function "Box::grow" is inaccessible
     p1.grow() ;
        ^

2 errors detected in the compilation of "pmain2.C".
everest%