Compilare: main.cpp: In function 'int main()': main.cpp:31:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( k == p ){ ~~^~~~ main.cpp:35:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if( k > p ){ ~~^~~ main.cpp:19:15: warning: unused variable 'power' [-Wunused-variable] short int power; ^~~~~ main.cpp:22:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in_file, "%lu", &p); ^