linux中小数的加减乘除

echo "scale=2; 1.23 + 4.56" | bc

echo "scale=2; 4.56 - 1.23" | bc

echo "scale=2; 1.23 * 4.56" | bc

echo "scale=2; 4.56 / 1.23" | bc

awk "BEGIN {printf \"%.2f\", 1.23 + 4.56}"

#!/bin/bash

# 加法
add() {
    echo "scale=2; $1 + $2" | bc
}

# 减法
subtract() {
    echo "scale=2; $1 - $2" | bc
}

# 乘法
multiply() {
    echo "scale=2; $1 * $2" | bc
}

# 除法
divide() {
    if [ "$2" -eq 0 ]; then
        echo "Error: Division by zero"
    else
        echo "scale=2; $1 / $2" | bc
    fi
}

# 使用示例
add 1.23 4.56
subtract 4.56 1.23
multiply 1.23 4.56
divide 4.56 1.23