C/C++ :: Sorting String From A File?

I am writing a code that is supposed to read a resistor code and determine the resistance nominal, lower, and upper and write those numbers to a file in various ways. I already accomplished writing to the file output and the file nominal but now I have to sort the file nominal by the nominal readings. I managed to tokenize the string so I could read the second part of the string .....

#include<stdlib.h>
#include<stdio.h>
#include<string.h>
double bandNum(char x);
double bandMult(char x);
double bandTol(char x);
int main() {
FILE *pFile;
FILE *pFileOutput;

[code]....