Compilare: user.cpp: In function ‘int main()’: user.cpp:10:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(c1,100005,si); ^ user.cpp:11:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(c2,100005,si); ^