compile-and-run.sh

#!/bin/sh

usage () {
    echo compile-and-run [program.cpp]
    echo
    echo Compiles and executes a c++ program.
    echo The standard input and output is passed down to the program.
    echo The exit status is that of the compiler.
}

if [ x"$1" = "x" ]; then
    usage
    exit 0
fi

if g++ prog.cpp; then
   ./a.out
else
   exit $?
fi