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Anonymous users2024-02-053. All include
using namespace std;
class score
public:
void set_score();
void show_score();
private:
int num;
int math;
int english;
int main()
score s1;;;
return 0;
void score::set_score()cout<<"Please enter your student number">num;
cout<<"Please enter a math grade">math;
cout<<"Please enter your English score">english;
void score::show_score()
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Anonymous users2024-02-04The tring class overloads the = operator and provides a copy constructor with char * as the source.
But you can't use = to char *, the c str() function of the string class can return the first address of its string, and you can assign string to char *
#include
using namespace std;
void main()
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Anonymous users2024-02-03In fact, there are several key points.
1。If the number of people cannot be determined in advance, it must be defined by dynamic memory, which is new.
2。A student's individual grades should be found to form a record, or from the perspective of a 2D array, it is a student record for one line.
Refer to the program.
#include
#include
using namespace std;
struct studentscore
class score;
score::score(int n)
score::~score()
void score::inscore(int num, float mathscore, float programscore, float engscore)
void score::showscore(int num)
void score::showallscore()
int main()
return 0;
1。Among them, struct can be regarded as a custom type, which organizes the results of each subject into a separate struct type.
ClassScore is an application of Dynamic Memory.
3。All data members (or attributes, i.e., variables listed under private) must be initialized in the constructor(score()).
4。Because there is dynamic memory, and because the dynamic memory( classscore) is a data member, delete must be done in the destructor (score()), which is the syntax and the specification.
5。n is the maximum number of student records that can be entered, and currrecord is the number of records that have been entered so far.
6。In my program, I type the total number of students and the grades of each subject directly in main, but you can also type in from the keyboard, read out from the file, or even get it from the database. If you want your class to be reused in the future, you can't fix the data in the score class, and you need to change it in the future, just change it to main.
7。If you don't use a struct, you can use a 2D array to record the entire class grade, but it's just a 2D dynamic array, which is more complicated.
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