Compilare: main.cpp: In function 'int main()': main.cpp:65:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir1, NMAX-2, fin); ^ main.cpp:67:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir2, NMAX-2, fin); ^ main.cpp:69:29: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir3, NMAX-2, fin); ^