Compilare: user.cpp: In function ‘int main()’: user.cpp:12:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld %lld",&p, &n); ^ user.cpp:17:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld %lld",&l,&c); ^ user.cpp:29:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld%lld",&j,&c); ^ user.cpp:37:26: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] s=s+i; ~^~~~