C++ Coding Explaining & Reviewing

#include <iostream>

#include <fstream>

#include <string>

using namespace std;

void sm(int scl, int sda);

enum states {

s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15, s16

};

struct i2c {

int scl;

int sda;

int item;

};

struct i2c traces[1000];

int trace_length;

int main()

{

int item, scl, sda, index;

string trace0;

ifstream myfile; /* Naming the file to open*/

string myline;

char read_write_mode = ‘R’;

bool ack = false;

int read_count = 0;

int write_count = 0;

int ack_count = 0;

int nack_count = 0;

trace0 = “t0.txt”; /* Choosing the file trace*/

myfile.open(trace0.c_str()); /* Open file c_str is for the first line*/

getline(myfile, myline); /* First line*/

index = 0;

while (!myfile.eof()) /* Assigning the clock and data from file to code*/

{

myfile >> item >> scl >> sda;

traces[index].item = item;

traces[index].scl = scl;

traces[index].sda = sda;

index++;

}

trace_length = index; /* to count traces*/

myfile.close();