File content as of revision 3:147e7a35d2c3:

#include "mbed.h"
#include <fstream>

#define MAX 0x0A

DigitalOut led_1(LED1);         //program running.
DigitalOut led_2(LED2);         //sensors operating.
DigitalOut led_3(LED3);         //is moving.
DigitalOut led_4(LED4);         //is complete.

DigitalOut Bit1(p25);           // mux/ pins
DigitalOut Bit2(p24);           //
DigitalOut Bit3(p23);           //

int rawUS_data[5]={0,0,0,0,0};  //raw data{chan1,chan2,chan3,chan4,chan5}

int US1_mean[MAX]={0,0,0,0,0,0,0,0,0,0};        // Structures holding recently recorded distances for each respective
int US2_mean[MAX]={0,0,0,0,0,0,0,0,0,0};        // ultrasonic sensor.
int US3_mean[MAX]={0,0,0,0,0,0,0,0,0,0};
int US4_mean[MAX]={0,0,0,0,0,0,0,0,0,0};
int US5_mean[MAX]={0,0,0,0,0,0,0,0,0,0};

std::string telemFile;          //file holding info about telem data gathered since last power on

void setActiveUS(int chan);

int getPing(void);

int main() {
    int iCount = 0;
    int measured = 0;
    
    while(iCount <= 5){
        setActiveUS(iCount);
        measured = getPing();
        rawUS_data[iCount] = measured;
    }
        
    US1_mean[0]=rawUS_data[0];
    US2_mean[0]=rawUS_data[1];
    US3_mean[0]=rawUS_data[2];
    US4_mean[0]=rawUS_data[3];
    US5_mean[0]=rawUS_data[4];

}

void setActiveUS(int chan){
    switch(chan){
        case 0:
            //ultrasonic 1
            break;
        
        case 1:
            //ultrasonic 2
            break;
            
        case 2:
            //ultrasonic 3
            break;
        
        case 3:
            //ultrasonic 4
            break;
        
        case 4:
            //ultrasonic 5
            break;
        
    }
}

int getPing(void){
    int result=0;   
    //write ultrasonic code
    //return measured value
    
    
    return result;      //should just do "return [operation that gives result];" for efficiency
}

// Opens set file for logging, appends some data, then returns.
// 
void telemSave(std::string data) {
    std::ofstream stream;
    stream.open(telemFile, std::ios::app);
    stream << data;
}