Compilare: user.cpp: In function ‘int main()’: user.cpp:56:66: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d %d %d %d %d " ,&n,&k1,&k2,&l1,&c1,&l2,&c2); ^ user.cpp:59:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&mat[i][j]); ^ user.cpp: In function ‘char cauta(int, int, char, char)’: user.cpp:25:1: warning: control reaches end of non-void function [-Wreturn-type] } ^