Compilare: user.cpp: In function ‘int main()’: user.cpp:42:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol[i-1][i]=c[ch[i-1]][ch[i]]; ^ user.cpp:42:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol[i-1][i]=c[ch[i-1]][ch[i]]; ^ user.cpp:50:106: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol[i][i+lun-1]=min(sol[i][i+lun-1-l]+sol[i+lun-l][i+lun-1],sol[i+1][i+lun-2]+c[ch[i]][ch[i+lun-1]]); ^ user.cpp:50:119: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol[i][i+lun-1]=min(sol[i][i+lun-1-l]+sol[i+lun-l][i+lun-1],sol[i+1][i+lun-2]+c[ch[i]][ch[i+lun-1]]); ^ user.cpp:13:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("redu.in","r",stdin); ^ user.cpp:14:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("redu.out","w",stdout); ^ user.cpp:15:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:16:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch[0]); ^ user.cpp:26:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch[i]); ^ user.cpp:30:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&ch[0]); ^ user.cpp:35:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&c[i][j]); ^