Compilare: user.cpp: In function ‘void df(int)’: user.cpp:52:33: warning: unused variable ‘dd’ [-Wunused-variable] if(low[c->inf]>=niv[i]){int dd=0,ok=0,init=st[nn][0]; ^ user.cpp:52:38: warning: unused variable ‘ok’ [-Wunused-variable] if(low[c->inf]>=niv[i]){int dd=0,ok=0,init=st[nn][0]; ^ user.cpp:52:43: warning: unused variable ‘init’ [-Wunused-variable] if(low[c->inf]>=niv[i]){int dd=0,ok=0,init=st[nn][0]; ^ user.cpp:40:13: warning: unused variable ‘ki’ [-Wunused-variable] int x,y,ki,j; ^ user.cpp:40:16: warning: unused variable ‘j’ [-Wunused-variable] int x,y,ki,j; ^ user.cpp: In function ‘int main()’: user.cpp:110:6: warning: unused variable ‘sum’ [-Wunused-variable] {int sum=0,k=0; ^ user.cpp:110:12: warning: unused variable ‘k’ [-Wunused-variable] {int sum=0,k=0; ^ user.cpp:111:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:113:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^