MT4 coding - parsing a bin file

Hi, i need to parse a bin file in mt4,but i can solve the compile grammar problem .help .thank you very much
(I know one solution is using FileReadInterger FileReadDouble api ,but i prefer using struct pointer )


struct StTest
{
int a;
int b;
double c;
char d[10];
};
void OnStart()
{
uchar buf[1000];
for(int i=0;i<ArraySize(buf);i++)
{
buf[i]=0x11;
}
StTest* p=(StTest*)buf; //big error
printf("%d %d %f %s",p.a,p.b,p.c,CharArrayToString(p.d)); //big error again
}

Not really understand what you wannt, but to write/read bin you can use the FileWriteArray/FileReadArray function.

Use FileReadStruct(). There is also an example of how to use it.

There are a few issues with this line.

1. You cannot use pointers to structs in MQL, only objects.
2. You cannot cast an array to a struct in general.

Also, FileWriteStruct only works with simple structs and won't work once you nest an array inside. What you need to do is subclass CObject and override the Save/Load methods so you can serialize your class when writing to the bin file. There are good examples of how to achieve this in the standard library... just crack open Include\CChartObjects lib and see how MetaQuotes implements this pattern.