Compilare: main.cpp: In function 'int main()': main.cpp:16:32: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(patt+1, 2000003, fin); ^ main.cpp:17:31: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(sir+1, 2000003, fin); ^