15th Week program Reading-binary files and files read 4

4. Read and run the following example to understand the general method of binary file and string flow operations.

Example 17

#include <strstream> #include <iostream>using namespace std;struct student{    int num;    Char name[20];    float score;}; int main () {    student stud[3]={1001, "Li", 78,1002, "Wang", 89.5,1004, "Fun",90};    char c[50];                //user-defined character arrays     Ostrstream strout (c,30);  //build output string stream, associate with array c, buffer length 30    for (int i=0;i<3;i++)      //to character array C write 3 student data         strout<<stud[i].num<<stud[i].name<<stud[i].score;    strout< <ends;              //ends is the I/O operator for C + +, insert a ′\\0′    cout<< "Array C:" << c<<endl;    //displays characters in array C     Ostrstream strout1 (c,40);  //at this point, C will be rewritten     for (int i=0;i<3;i++)               strout1<& lt;stud[i].num<< "" <<stud[i].name<< "" <<stud[i].score;    strout1<<ends;              //ends is the I/O operator for C + +, insert a ′\\0′    cout<< "Array C:" << c<<endl;    //displays characters in array C     return 0;}

Operation Result:

15th Week program Reading-binary files and files read 4