Compilare: user.cpp: In function ‘int main()’: user.cpp:29:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d ",&n,&m); ^ user.cpp:31:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%c %c ",&c1,&c2); ^ user.cpp:36:21: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] s+=recurs(n,i); ^