Compilare: main.cpp: In function 'void read()': main.cpp:27:15: warning: array subscript has type 'char' [-Wchar-subscripts] let[x1][x2]=0; ^ main.cpp:27:19: warning: array subscript has type 'char' [-Wchar-subscripts] let[x1][x2]=0; ^ main.cpp:28:15: warning: array subscript has type 'char' [-Wchar-subscripts] let[x2][x1]=0; ^ main.cpp:28:19: warning: array subscript has type 'char' [-Wchar-subscripts] let[x2][x1]=0; ^ main.cpp:21:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&l); ^ main.cpp:22:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&q); ^ main.cpp:24:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%c %c\n",&x1,&x2); ^ main.cpp: In function 'int main()': main.cpp:56:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv.in","r",stdin); ^ main.cpp:57:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv.out","w",stdout); ^