Beginner trying to use SD card

Other Hardware Storage
2

All this code:-

//Temperature setup
double Thermister(int RawADC) {  //Function to perform the fancy math of the Steinhart-Hart equation
 double Temp;
 Temp = log(((10240000/RawADC) - 10000));
 Temp = 1 / (1.133E-3 + ( 2.334E-4 + ( 9.056E-8 * Temp * Temp ))* Temp );
 Temp = Temp - 273.15;              // Convert Kelvin to Celsius
 Temp = (Temp * 9.0)/ 5.0 + 32.0; // Celsius to Fahrenheit - comment out this line if you need Celsius
 return Temp;
}

//Current Setup
{
  emon1.current(1, 1.82);             // Current: input pin, calibration.
}

is outside a function. The last bit is calling a function, you can't do that outside a function.

You need to know what this is doing any why the function head is missing.