Strlwr là gì

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#include

#include

#define max 100

charDoiThanhThuong(chars[])

{

                                             inti;

                                             for(i=0;i<strlen(s);i++)

                                             {

                                                if(s[i]>='A' && s[i]<='Z')

                                                {

                                                            s[i]=s[i]+32;

                                                }          

                                             }

                                             printf("%s",s);

}

int main()

{

                                             chars[max];

                                             printf("Nhap chuoi: ");

                                             gets(s);

                                             DoiThanhThuong(s);

}

Nhap chuoi: Vu Van LONG

vu van long

Nhap chuoi: Nhap Mon LAp TRinh C

nhap mon lap trinh c