Compilare: main.cpp: In function 'int main()': main.cpp:71:22: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(buff, 32, fi); ^ main.cpp:77:21: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(buff, 32, fi);; ^ main.cpp:82:22: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(buff, 32, fi); ^