Compilare: main.cpp: In function 'int main()': main.cpp:52:42: warning: array subscript has type 'char' [-Wchar-subscripts] w[ln[con]][cl[con]]=w[ln[nr]][cl[nr]]+1; ^ main.cpp:52:51: warning: array subscript has type 'char' [-Wchar-subscripts] w[ln[con]][cl[con]]=w[ln[nr]][cl[nr]]+1; ^ main.cpp:52:61: warning: array subscript has type 'char' [-Wchar-subscripts] w[ln[con]][cl[con]]=w[ln[nr]][cl[nr]]+1; ^ main.cpp:52:69: warning: array subscript has type 'char' [-Wchar-subscripts] w[ln[con]][cl[con]]=w[ln[nr]][cl[nr]]+1; ^ main.cpp:11:26: warning: unused variable 'st' [-Wunused-variable] int p,n,m,i,j,nr,con,st,k,maxx=0; ^~ main.cpp:12:10: warning: unused variable 'c' [-Wunused-variable] char c; ^ main.cpp:9:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in","r",stdin); ^ main.cpp:10:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out","w",stdout); ^ main.cpp:13:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&n,&m); ^ main.cpp:16:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%1c",&v[i][j]); ^ main.cpp:19:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%1c",&v[i][j]); ^ main.cpp:11:17: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] int p,n,m,i,j,nr,con,st,k,maxx=0; ^