Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:63: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long int’ user.cpp:66: error: ‘system’ was not declared in this scope user.cpp:71: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’ user.cpp:26: warning: unused variable ‘w’ user.cpp:26: warning: unused variable ‘q’ user.cpp:26: warning: unused variable ‘c’ user.cpp:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result