Code not Compiling

I was experimenting with the nrf modules and wrote the following code of a client.But the code isn’s compiling and the progress gets stuck.I am using Arduino 1.6.4

/** RF24Mesh_Example.ino by TMRh20
 *
 * This example sketch shows how to manually configure a node via RF24Mesh, and send data to the
 * master node.
 * The nodes will refresh their network address as soon as a single write fails. This allows the
 * nodes to change position in relation to each other and the master node.
 */


#include "RF24.h"
#include "RF24Network.h"
#include "RF24Mesh.h"
#include <SPI.h>
#include <EEPROM.h>
//#include <printf.h>


/**** Configure the nrf24l01 CE and CS pins ****/
RF24 radio(9, 10);
RF24Network network(radio);
RF24Mesh mesh(radio, network);

/**
 * User Configuration: nodeID - A unique identifier for each radio. Allows addressing
 * to change dynamically with physical changes to the mesh.
 *
 * In this example, configuration takes place below, prior to uploading the sketch to the device
 * A unique value from 1-255 must be configured for each node.
 * This will be stored in EEPROM on AVR devices, so remains persistent between further uploads, loss of power, etc.
 *
 **/
#define nodeID 1


uint32_t displayTimer = 0;
String switch_status="";
String relay_status="0000";
const uint8_t analogpins[] = {A0,A1,A2,A3};
int SC = 0;
struct server_payload
{
  char command;
}
void setup() {

  Serial.begin(57200);
  //printf_begin();
  // Set the nodeID manually
  mesh.setNodeID(nodeID);
  // Connect to the mesh
  Serial.println(F("Connecting to the mesh..."));
  mesh.begin();
  pinMode(A0,OUTPUT);
  pinMode(A1,OUTPUT);
  pinMode(A2,OUTPUT);
  pinMode(A3,OUTPUT);
  pinMode(4,INPUT);
  pinMode(5,INPUT);
  pinMode(6,INPUT);
  pinMode(7,INPUT);
  digitalWrite(A0,LOW);
  digitalWrite(A1,LOW);
  digitalWrite(A2,LOW);
  digitalWrite(A3,LOW);
}



void loop() {
  for(int i=0;i<=3;i++)
    switch_status  += String(digitalRead(i+4));
  mesh.update();
  if (millis() - displayTimer >= 1000) 
  {
    displayTimer = millis();
    // Send an 'M' type message containing the current millis()
    for(int i =0;i<= 3;i++)
    {
      if (!mesh.write(&switch_status, 'M', sizeof(switch_status))) 
      {
        if ( ! mesh.checkConnection() ) 
        {
          Serial.println("Renewing Address");
          mesh.renewAddress();
          break;
        } 
        else 
        {
          Serial.println("Send fail, Test OK");
        }
      } 
      else 
      {
        Serial.print("Send OK: "); Serial.print(switch_status,sizeof(switch_status));
      }
  }
  Serial.println("");
    
  while (network.available()) 
  {
    RF24NetworkHeader header;
    server_payload payload;
    network.read(header, &payload, sizeof(payload));
    if(header.from_node == 0)
    {
      write_pins(payload);
    }
  }
}
}

void write_pins(server_payload payload)    //used to toggle analog pins.
{
  if (payload.command)
  {
    for(int i=0;i<=3;i++)
    {
      digitalWrite(analogpins[i],int(switch_status[i]);
    }
    relay_status = switch_status
  }
  else if (payload.command == 0)
  {
    return;
  }
  else
  {
    for(int i=0;i<=3;i++)
    {
      digitalWrite(analogpins[i],int(relay_status[i]);
    }
  }
}

Thanks in advance.

Any error message ?

(At least I can tell you that you need to add ';' line 43 :wink: )

      digitalWrite(analogpins[i],int(switch_status[i]);

It makes NO sense to call the array that contains the numbers of pins that are used as digital pins "analogpins". It just makes you look clueless.