foo.cpp: In function 'void maketree(FBI*, char*, int)':
foo.cpp:20:17: error: 'strstr' was not declared in this scope
foo.cpp:32:19: error: 'strncpy' was not declared in this scope
foo.cpp:37:16: error: 'strstr' was not declared in this scope
foo.cpp:45:16: error: 'strstr' was not declared in this scope
foo.cpp: In function 'int main()':
foo.cpp:58:16: error: 'scanf' was not declared in this scope
foo.cpp:59:14: error: 'strlen' was not declared in this scope
foo.cpp:60:20: error: 'strcmp' was not declared in this scope
foo.cpp:68:17: error: 'strstr' was not declared in this scope