Store AT Command result into a variable and send to a number

This is what is displayed on the serial monitor and how do i store the airtime balance message into a variable and send it as a message to another number

AT+CMGF=1

OK
AT+CNMI=2,2,0,0,0

OK
AT+CSCS="GSM"

OK
AT+
+CUSD: 0,"Your a/c is GHC1.95,SMS Bonus is 0.00GHC,Bonus a/c is 2.00GHC,IDD Bundle is 0.00GHC,BOR a/c 0.00GHC,Data Bonus is 0.00MB.internet bundle is 0.00MB.

This is the actual code

//Include Library because we are using digital pins for connection
#include "SIM900.h"
#include <SoftwareSerial.h>
#include "sms.h"
SMSGSM sms;
/*Initializing digital pins for connection to serve as Rx and Tx
Rx pin is 7 and Tx pin is 8*/
SoftwareSerial SIM900(7, 8);

//Variable for storing incoming messsages content
char incoming_char=0;

//Variable to store airtime balance string
 int airtime;

void setup()
{
  // initialize digital pin 13 as an output
  pinMode(13, OUTPUT);
  
  // Baudrate for serial monitor
  Serial.begin(19200);
  //Baudrate for GSM shield
  SIM900.begin(19200); 
  // Give time to log on to network.
  delay(20000);  
 
 // Turn the LED on (HIGH is the voltage level)
    digitalWrite(13, HIGH);   
    delay(100);
   
 // Set SMS mode to text for GSM MODULE
  SIM900.print("AT+CMGF=1\r"); 
  delay(100);
  SIM900.print("AT+CNMI=2,2,0,0,0\r"); 
  // blurt out contents of new SMS upon receipt to the GSM shield's serial out
  delay(100);
  
  //Change Character Set to GSM
  SIM900.print("AT+CSCS=\"GSM\"\r");
  delay(100);
  
  //AT command to check airtime balance
  SIM900.print("AT+CUSD=1,\"*124#\"\r");
  delay(100); 
}

void loop()
{   
  //Send Message function intialization
   SendMessage();
  
  // Now we simply display any text that the GSM shield sends out on the serial monitor
  if(SIM900.available() >0)
  {  
    //Get the character from the cellular serial port.
    incoming_char=SIM900.read(); 
    //Print the incoming character to the terminal.
    Serial.print(incoming_char); 
  }
}

//Function to SMS based on airtime status
  void SendMessage(){
    
  
  //Storing credit balance details in airtime variable
  airtime = SIM900.print("AT+CUSD=1,\"*124#\"\r");
  
  //Conditional Statement for credit balance 
    if (airtime < 1.00){
     
   //Turn the LED on (LOW is the voltage level)
    digitalWrite(13, LOW);   
    delay(1000);
     
   //Sets the GSM Module in text mode
   SIM900.print("AT+CMGF=1\r");
  //Delay of 100 milli seconds
   delay(100);
  //Phone number to send SMS 
   SIM900.print("AT+CMGS=\"+233246692584\"\r");
   delay(100);
  //The SMS text you want to send
   SIM900.print("Your a/c is Below GHC1.00,You have been DISCONNECTED !! ");
   delay(100);
   //Print on serial monitor
   Serial.println("\n SMS Sent");
  //ASCII code of CTRL+Z
   SIM900.print((char)26);
   delay(100);
   }
   
   else {
  //Sets the GSM Module in text mode
   SIM900.print("AT+CMGF=1\r");
  //Delay of 100 milli seconds
   delay(100);
  //Phone number to send SMS 
   SIM900.print("AT+CMGS=\"+233246692584\"\r");
   delay(100);
  //The SMS text you want to send
   SIM900.print("Your a/c is Above GHC1.00,You are CONNECTED !! ");
   delay(100);
   //Print on serial monitor
   Serial.println("\n SMS Sent");
  //ASCII code of CTRL+Z
   SIM900.print((char)26);
   delay(100); 
   }
 }

Same question as at Error when checking airtime balance using AT commands - #6 by Kelvinkwame - Networking, Protocols, and Devices - Arduino Forum

Failing to understand how to program does mean you keep spamming the board with the same question.

Sorry for re-posting the same prohlem.i.just managed to get beyond my initial problem and this is the current one.So please you can assist me with the necessary measures to take to solve the problem.

Please can someone help me out

Did you find the solution. I have a same problem and did not find any solution on any forum.

Allocate a buffer to hold the longest message that you expect.

If you run out of memory (check by placing that buffer in the global space before setup()), you need a different approach by looking for a certain key part in the message, store the data associated with that, look for the next key part and store the associated data, and so on.

In the example in the opening post, you can e.g. look for the key word is.