flood.cpp: In function 'int unire(int, int)': flood.cpp:39: warning: no return statement in function returning non-void flood.cpp: In function 'int main()': flood.cpp:43: warning: unused variable 'j' flood.cpp:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result flood.cpp:50: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result flood.cpp:53: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result flood.cpp:56: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result flood.cpp:59: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result