Compilare: user.cpp: In function ‘int a()’: user.cpp:81:9: warning: unused variable ‘vrg’ [-Wunused-variable] int vrg=0; ^ user.cpp: In function ‘int main()’: user.cpp:122:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("4-apel.in" , "r" , stdin); ^ user.cpp:123:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apel.out", "w" , stdout); ^ user.cpp:126:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(ch,260,stdin); ^ user.cpp:133:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(cf,260,stdin); ^ user.cpp:148:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(cf,260,stdin); ^