Compilare: user.cpp: In function ‘int main()’: user.cpp:46:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &n, &k, &c, &s); ^ user.cpp: In function ‘int f1(int, int, int, int, int, int)’: user.cpp:21:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int f2(int, int, int, int, int, int, int)’: user.cpp:40:1: warning: control reaches end of non-void function [-Wreturn-type] } ^