Compilare: main.cpp: In function 'int main()': main.cpp:9:17: warning: variable 'val' set but not used [-Wunused-but-set-variable] int n,m,i,j,val,x,cx,iant,jant; ^~~ main.cpp:9:26: warning: unused variable 'iant' [-Wunused-variable] int n,m,i,j,val,x,cx,iant,jant; ^~~~ main.cpp:9:31: warning: unused variable 'jant' [-Wunused-variable] int n,m,i,j,val,x,cx,iant,jant; ^~~~ main.cpp:7:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("placare1.in","r",stdin); ^ main.cpp:8:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("placare1.out","w",stdout); ^