Compilare: user.cpp: In function ‘int main()’: user.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l == strlen(sir)) ^ user.cpp:22:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", cuv); ^