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Homogeneous aggregate

Homogeneous aggregate. name: Tom, John, student-3, student_4,........, student-20. mid1: 70, 67, 86, 59, ........, 80. final: 69, 77, 79, 64, ........, 90.

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Homogeneous aggregate

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  1. Homogeneous aggregate name: Tom, John, student-3, student_4,........, student-20 mid1: 70, 67, 86, 59, ........, 80 final: 69, 77, 79, 64, ........, 90 GPA: 3.02, 2.89, 3.21, 2.78, ........, 3.67 // Using array string name[20]; int mid1[20]; int final[20]; double GPA[20]; name[0] = "Tom"; GPA[2] = 3.21; // Using tvector class #include "tvector.h" .............. tvector<string> name(20); tvector<int> mid1(20); tvector<int> final(20); tvector<double> GPA(20); name[1] = "John"; GPA[19] = 3.67;

  2. Search in a tvector // Using tvector class #include "tvector.h" .............. tvector<string> name(20); tvector<int> mid1(20); tvector<int> final(20); tvector<double> GPA(20); ..... ..... // What is Susan's GAP? for (int i=0; i < name.length(); i++) { if (name[i] == "Susan") cout << GPA[i]; }

  3. What can be in an Array // Using tvector class ..... ..... struct student { string name; int mid1; int final; double GPA; }; ...... struct student class101[20]; ..... // What is Susan's GAP? for (int i=0; i < class101.length(); i++) { if ( (class101[i]).name == "Susan") cout << (class101[i]).GPA; }

  4. Enumerated Types Sunday Monday Tuesday Wednesday Thursday Friday Saturday Monday Tuesday Wednesday Thursday Friday Saturday Sunday enum day {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}; tvector<int> MyclassHr(7); MyclassHr[Monday] = 2; MyclassHr[Tuesday] = MyclassHr[Thursday] = 0; MyclassHr[Wednesday] = 4; day ThreeDays[3]; day ADay; ThreeDay[0]=Saturday; ...... if (ADay == Saturday || ADay == Sunday) cout << "It's weekend"; day FirstDay = day(0);

  5. Two dimensional array, Matrix + = // Using array int A[3][3]; int B[3][3]; int C[3][3]; A[1][2] = 3; A[1][1] = 1; C[2][1] = A[2][1]+B[2][1]; // Using apmatrix class #include "apmatrix.h" .............. apmatrix<int> A(3,3); apmatrix<int> B(3,3); apmatrix<int> C(3,3); A[1][2] = 3; A[1][1] = 1; C[2][1] = A[2][1]+B[2][1];

  6. Operation on Matrix // Using apmatrix class #include "apmatrix.h" .............. apmatrix<int> A(3,3); apmatrix<int> B(3,3); apmatrix<int> C(3,3); int i,i; ..... ..... for (i=0;i<A.numrows();i++) for (j=0;j<A.numcols();j++) C[i][j] = A[i][j] + B[i][j]; Easy problem: How to printout a matrix? Challenging problem: How to do multiplication?

  7. <vector> in STL (Standard Template Library) #include <iostream> #include <vector> #include <string> .............. struct student { string name; int ssn; }; ............... student s; vector<student> CS2; while (true) { cout << "Input SSN:"; cin >> s.ssn; if (s.ssn == 0) break; cout << "Input name:"; cin >> s.name; CS2.push_back(s); } for (int i=0;i<CS2.size();i++) { cout << "\nName:" << CS2[i].name << " "; cout << "SSN:" << CS2[i].ssn; } CS2 CS2[0] CS2[1] CS2[2] CS2[3]

  8. Resize a vector CS2 CS2[0] CS2[1] CS2[2] the last push back here CS2[3] CS2[4] CS2.resize(6) CS2[5]

  9. Reserve a vector CS2 CS2[0] CS2[1] CS2[2] the last push back here CS2[3] CS2[4] CS2.resize(6) CS2[5] CS2.reserve(8)

  10. pop back a vector CS2 CS2[0] size CS2[1] .... CS2.resize(6); CS2.pop_back(); CS2.pop_back(); CS2.pop_back(); CS2[2] reserved CS2[3] CS2[4] CS2[5]

  11. Stack and Queue Stack: LCFS (Last Come First Service) c5 c4 Queue: FCFS (First Come First Service) c5 c1 Back Front

  12. <deque> in STL (Double Ended Queue) #include <iostream> #include <deque> #include <string> .............. deque<student> CS2; .............. while (true) { cout << "Input SSN:"; cin >> s.ssn; if (s.ssn == 0) break; cout << "Input name:"; cin >> s.name; CS2.push_front(s); CS2.push_back(s); } for (int i=0;i<CS2.size();i++) { cout << "\nName:" << CS2[i].name << " "; cout << "SSN:" << CS2[i].ssn; } CS2 CS2[0] CS2[1] CS2[2] CS2[3]

  13. pop back and pop front a deque CS2 CS2[0] CS2[0] CS2 CS2[1] CS2[0] CS2[2] .... CS2.pop_front(); CS2.pop_back(); CS2[1] CS2[3] CS2[2] CS2[4] CS2[4]

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