Mã chấm: 19917

Main.cc: In function ‘void DemSo(int, int, int*, int*)’:
Main.cc:30:12: error: return-statement with a value, in function returning 'void' [-fpermissive]
     return dem;
            ^~~
Main.cc: In function ‘int main()’:
Main.cc:38:11: error: ‘m’ was not declared in this scope
     DemSo(m,n,a,b);
           ^
Main.cc: In function ‘void nhapmang(int*, int)’:
Main.cc:6:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~