fread() binary mode not working properly in c++ - c++

Question

I was facing a problem with the fread() function while coding in c++ .
The target is to open a file in binary mode for writing using :
fopen_s(&filename,filelocation,"wb"); , write a string and an int to be precise using fwrite(&buffer,size_of_read,count,filename) and then to read back the data into other variables (note that this may seem foolish to write and then read data from the same file in the same program, but this is just for testing purpose, since the project I am working on is strictly based upon encryption, and this is one of the modules)...
Here's my code :
int x = 1; // this is piece of data to write to the file
FILE *src; // the file variable that I am using
string text = "byebye"; // this happens to be the piece of data
src = fopen("F:\\_log.log", "wb"); // open file in binary write mode
fwrite(&text, 1, 7, src); // that's 7 because of 6 characters plus '\0'
fwrite(&x, 4, 1, src); // 4 bytes for int ---> writing x=1 to file
text.clear(); // for verification purpose
fclose(src);
src = fopen("F:\\_log.log", "rb");
int y = 0; // this is the int that will contain read data
string read; // string that contains read data
fread(&read, 1, 7, src); // read the data and store in read
fread(&y, 4, 1, src); // read the stored int into y
cout << "string is : " << read << "\nNumber is : " << y << endl;
The output of the above program seems to be correct for integers but not for strings...
string is :
Number is : 1
The Number is : 1 statements clears that first y was zero but the data from the file had been successfully read and stored in y which then turned to 1
But, if the integer has been correctly read, then why not the string read
Also, there seems to be a sync in text and read because if I change the command text.clear(); to text="higuys"; then the output is :
string is : higuys
Number is : 1
How do I solve this ? (completely unable to understand what in the world is being processed in that code...)
Additional information (though it may not do much good) :
OS : Windows 10
IDE : codeblocks (tried with visual studio too)
Compiler : GNU GCC
Debugger : GDB
I have tried to check for any errors using perror(); and tricks like cout<<fread(&read,1,7,src)<<endl; to check the number of bytes read, but everything was OK. Please help me with this one.....
EDIT :
OK, I have tried using array of char instead of string and it worked !!
But still, one thing is not clear and that is : why are the two strings text and read in sync ?

Answer 1

You need to change
string read;
to
char read[7];
string is a class and not a buffer, so you cannot fread giving the address of a string object.
If the program is not only for a fixed 7 bytes string and not only C (you tagged the question as C++) then you should consider using ifstream/ofstream and string and write/read using operators << and >>.