Compilare: user.cpp: In function ‘int main()’: user.cpp:44:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp:41:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%hd%d\n", &n, &m); ^ user.cpp:46:35: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(cuv[i],LENGTH+1, in); ^ user.cpp:48:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%c\n", &query[j]); ^