CString. 类 CString sI=“abc”,s2=def”; afx. h char all=“xy”,a2=“uvw”; sI. MakeUppero s1=s2 struer(al); strcpy al, a2); string. h• CString类 CString s1=“abc”,s2=def”; +、= afx.h char a1[]=“xyz”,a2[]=“uvw”; s1. MakeUpper(); s1=s2; strupr(a1); strcpy(a1,a2); string.h