jungla.cpp: In function 'void read()': jungla.cpp:61: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result jungla.cpp:66: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result jungla.cpp: In function 'int bfs(int)': jungla.cpp:95: warning: comparison between signed and unsigned integer expressions jungla.cpp:115: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp:123: warning: comparison between signed and unsigned integer expressions jungla.cpp:125: warning: suggest explicit braces to avoid ambiguous 'else' jungla.cpp: In function 'void determine_cycle3(int, int)': jungla.cpp:174: warning: 'pozx' may be used uninitialized in this function jungla.cpp:174: warning: 'pozy' may be used uninitialized in this function