barca1.cpp: In function 'void combine_Heap(int, int)': barca1.cpp:17: warning: suggest explicit braces to avoid ambiguous 'else' barca1.cpp: In function 'int main()': barca1.cpp:92: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result barca1.cpp:93: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result barca1.cpp:95: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result barca1.cpp:99: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result barca1.cpp:105: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result barca1.cpp:112: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result