... <math.h>typedef struct tagcomplex {float thuc, ao;} complex;complex tong(complex a, complex {complex c;c.thuc = a.thuc + b.thuc;c.ao = a.ao + b.ao;return c;}complex hieu(complex a, complex {complex c;c.thuc ... cin>>cot2; }while(cot2 != cot1); nhapmt(b,hang2,cot2); inmt(b,hang2,cot2); cout<<"\nVay tong cua hai ma tran a,b la: \n"; congmt(a,b,c,hang1,cot1); inmt(c,hang1,cot1); ... cin>>hang1; cout<<"Nhap vao so cot cua ma tran a: "; cin>>cot1; nhapmt(a,hang1,cot1); inmt(a,hang1,cot1); int hang2,cot2; cout<<"Moi ban nhap vao...