View Compilation Error

0_0_19217140_17192.cpp: In function 'void dfs(int)':
0_0_19217140_17192.cpp:112:26: error: 'c' was not declared in this scope
                      for(c=0; c<7 ;c++)//回溯，也可以用memcpy（）将值复制过来咯
                          ^
0_0_19217140_17192.cpp:138:26: error: 'c' was not declared in this scope
                      for(c=0 ; c<8 ;c++)
                          ^
0_0_19217140_17192.cpp:167:26: error: 'c' was not declared in this scope
                      for(c=0 ; c<8 ;c++)
                          ^
0_0_19217140_17192.cpp:195:26: error: 'c' was not declared in this scope
                      for(c=0; c<7 ;c++)
                          ^