T="$((PRICE*QTY))"|bc; gives line 272: 12.00: Syntax error: invalid arithmetic operator (error token is “.00”) or .50
"$((PRICE*QTY))"|bc
取决于用户输入.如何将这两个变量相乘并得到总共2个小数点？
PRICE=1.1 QTY=21 RES=$(echo "scale=4; $PRICE*$QTY" | bc) echo $RES
