Compilare: user.cpp: In function ‘int main()’: user.cpp:105:40: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 3 has type ‘ld* {aka long double*}’ [-Wformat=] fscanf(fin, "%lf %lf", &speed, &lim); ^ user.cpp:105:40: warning: format ‘%lf’ expects argument of type ‘double*’, but argument 4 has type ‘ld* {aka long double*}’ [-Wformat=] user.cpp:126:32: warning: format ‘%lf’ expects argument of type ‘double’, but argument 3 has type ‘ld {aka long double}’ [-Wformat=] fprintf(fout, "%.10lf", ans); ^ user.cpp:95:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &n, &m, &k); ^ user.cpp:99:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x; fscanf(fin, "%d", &x); ^ user.cpp:105:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lf %lf", &speed, &lim); ^ user.cpp:109:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &a, &b, &c); ^