Compilare: user.cpp: In function ‘float backt(int)’: user.cpp:29:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(sol[k-1] < sol[k]) ^ user.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:41:33: 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:44:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%f", &p[i]); ^