SSH into remote computer and compile/run code - bash

Question

I made a script (below) that goes into a remote computer and runs C code on it. This script works perfectly but asks for the password multiple times. How can I make it only ask for the password once?
#!/bin/bash
USER=myusername
COMP=remote_computer_name
OUTPUT=$1
ARGS=${#:2}
CODE_DIR="Dir_$$"
SCRIPT_NAME=$(basename $0)
LAST_CREATED_DIR=$(ls -td -- */ | head -n 1)
#Check if we are on local computer. If so, we copy the
#current directory to the remote run this script on the remote
if [ "${HOSTNAME}" != "${COMP}" ]; then
if [ "$#" -lt 1 ]; then
echo "Incorrect usage."
echo "Usage: ./${SCRIPT_NAME} <compiled_c_output_name> <arg1> <arg2> ... <argN>"
exit
fi
# Check if there is no makefile in the current directory
if [ ! -e [Mm]akefile ]; then
echo "There is no makefile in this directory"
exit
fi
echo "On local. Copying current directory to remote..."
scp -r ./ ${USER}#${COMP}:/ilab/users/${USER}/${CODE_DIR}
ssh ${USER}#${COMP} "bash -s" < ./${SCRIPT_NAME} ${OUTPUT} ${ARGS}
else
echo "On remote. Compiling code..."
cd $LAST_CREATED_DIR
make clean
make all
if [ -e $OUTPUT ]; then
echo "EXECUTING \"./${OUTPUT} ${ARGS}\" ON REMOTE ($COMP)"
./${OUTPUT} ${ARGS}
fi
fi

Answer 1

You can use SSH-Key authentication technique for password less login -
Here are the steps :
Generate RSA key -
ssh-keygen -t rsa
This generates two files under /home/<user>/.ssh/ id_rsa
(Private) and id_rsa.pub (Public)
The second file is your public key. You have to copy the contents of
this file over to the remote computer you want to log into and append
it to /home/<user>/.ssh/authorized_keys or use ssh-copy-id
utility if available (ssh-copy-id username#remote_host)
After this, the authentication is done by the public-private key pair
and you may not require a password henceforth.

Answer 2

You can use sshpass. Here is an example:
sshpass -pfoobar ssh -o StrictHostKeyChecking=no user#host command_to_run
More info, here:
https://askubuntu.com/questions/282319/how-to-use-sshpass