Compilare: main.cpp: In function 'int main()': main.cpp:32:17: warning: unused variable 'val1' [-Wunused-variable] int t , i , val1 , str , stl , stu , drl , drr , dru; ^~~~ main.cpp:34:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:39:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&n); ^ main.cpp:40:37: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (a + 1 , n + 10 , fin); ^ main.cpp:41:37: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (b + 1 , n + 10 , fin); ^