Compilare: user.cpp: In function ‘int convert_to_number(char*)’: user.cpp:19: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void test_ec(char*, int)’: user.cpp:55: warning: unused variable ‘nsol’ user.cpp: In function ‘void read()’: user.cpp:113: warning: unused variable ‘temp_t’ user.cpp:113: warning: unused variable ‘j’ user.cpp:116: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:120: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:130: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result