Main.cc: In function ‘void TongLonNhat()’:
Main.cc:8:5: error: ‘C’ was not declared in this scope
C[1][1]=A[1][1];
^
Main.cc:8:13: error: ‘A’ was not declared in this scope
C[1][1]=A[1][1];
^
Main.cc:9:19: error: ‘n’ was not declared in this scope
for(int i=2;i