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World of Shareware - Software Farm 2
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CPROG
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BEGINCPP.ZIP
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#6.CPP
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C/C++ Source or Header
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1990-08-04
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3KB
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108 lines
#include <stdio.h>
#include <string.h>
enum year { freshman, sophomore, junior, senior };
enum support { ta, ra, fellowship, other };
enum level { undergraduate, graduate };
class student {
private: //private member only visible in base class
level pr_member; //equivalent to int pr_member;
void set_pr_member() { pr_member = undergraduate; } //private function
protected: //visible to subclasses derived from student
int student_id;
float gpa;
public:
student (int id, float g) { set_pr_member(); student_id = id; gpa = g; }
char name [15];
char college [12];
char major [14];
year yr;
void print() { printf("%-15s %-15s %4d %-12s %-14s %-9s %4.2f\n",
l_char(pr_member), name, student_id, college,
major, y_char(yr), gpa);
}
friend char * y_char (year); //convert year to characters
friend char * l_char (level); //convert level to characters
};
class grad_student : public student {
private:
support s;
public:
grad_student(support x, int id, float g) : (id, g) { s = x; }
char dept [15];
char thesis [50];
void print() { printf("%-15s%-10s %-50s\n", dept, s_char(s), thesis); }
friend char *s_char(support); //convert support to characters
};
void proc1(student &), proc2(grad_student &); //pass by reference
main()
{
student s1 (100, 2.99);
grad_student gs1 (ta, 200, 3.01);
proc1(s1);
s1.print();
proc2(gs1);
gs1.print();
}
void proc1(student &sp) //assign to sp
{
strcpy(sp.name, "Loope deLoop");
strcpy(sp.college, "Art&Science");
strcpy(sp.major, "French");
sp.yr = senior;
}
void proc2(grad_student &gsp) //assign to gsp
{
strcpy(gsp.name, "Yogi Bear");
strcpy(gsp.dept, "Entertainment");
strcpy(gsp.college, "Business");
strcpy(gsp.thesis, "10000 ways to be smarter than the average bears");
strcpy(gsp.major, "");
}
char * l_char (level l)
{
switch (l) {
case undergraduate : return "Undergraduate";
case graduate : return "Graduate";
}
}
char * y_char (year yr)
{
switch (yr) {
case freshman : return "Freshman";
case sophomore: return "Sophomore";
case junior : return "Junior";
case senior : return "Senior";
}
}
char * s_char (support s)
{
switch (s) {
case ta : return "Ta";
case ra : return "Ra";
case fellowship : return "Fellowship";
case other : return "Other";
}
}
/* output:
Undergraduate Loope deLoop 100 Art&Science French Senior 2.99
Entertainment Ta 10000 ways to be smarter than the average bears
*/