Compilare: main.cpp: In function 'int main()': main.cpp:18:11: warning: unused variable 'm' [-Wunused-variable] int n,m,cpromeo,lp,cp,lin,col,nrcamere=0,ctmax,lmax=200,cmax=200,i,j,cer,inc,sf,max=0,x,lmin,cmin; ^ main.cpp:18:13: warning: unused variable 'cpromeo' [-Wunused-variable] int n,m,cpromeo,lp,cp,lin,col,nrcamere=0,ctmax,lmax=200,cmax=200,i,j,cer,inc,sf,max=0,x,lmin,cmin; ^~~~~~~ main.cpp:18:46: warning: unused variable 'ctmax' [-Wunused-variable] int n,m,cpromeo,lp,cp,lin,col,nrcamere=0,ctmax,lmax=200,cmax=200,i,j,cer,inc,sf,max=0,x,lmin,cmin; ^~~~~ main.cpp:18:91: warning: unused variable 'x' [-Wunused-variable] int n,m,cpromeo,lp,cp,lin,col,nrcamere=0,ctmax,lmax=200,cmax=200,i,j,cer,inc,sf,max=0,x,lmin,cmin; ^ main.cpp:16:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("castel3.in","r",stdin); ^ main.cpp:17:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("castel3.out","w",stdout); ^ main.cpp:19:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&cer,&n); ^ main.cpp:24:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^