foo.cpp: In function 'void spfa(int, int*, int*, node*)':
foo.cpp:36:29: error: 'memset' was not declared in this scope
 {   memset(inq,0,sizeof(inq));
                             ^
foo.cpp:46:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
          if(s==1) 
            ^
foo.cpp: In function 'void work()':
foo.cpp:61:29: error: 'memset' was not declared in this scope
    memset(d1,0x4f,sizeof(d1));
                             ^