Shell Calculation Tool Source code

#!/bin/bash# defines greatest common divisor and the minimum number of conventions gcd_result= "lcm_result=" "#定义一个相加的函数function  sum ()  { result=$ (  num1+num2 )   echo -e  "\033[31m  two number of $result \033[0m"}# Define a greatest common divisor function function divisor ()  { if [  "$num 1"  -eq  "$num 2"  ];     then        s_great= $num 1       s_small= $num 2       #export  s_great        #export  s_small fi   if [  "$num 1"  -gt  "$num 2"  ];     then        s_great= $num 1        s_small= $num 2   else       s_great=$ Num2       s_small= $num 1   fi  i=1    gcd_result=1   greattmp=1&nbSp;  smalltmp=1   lcm_result=1   export gcd_result while  [  $i  -le  "$s _small"  ]   do       greattmp= ' expr  $s _great %  $i '       smalltmp= ' expr  $s _small  %  $i '       if [ ${greattmp} -eq 0 ];  Then           if [ ${smalltmp} -eq  0 ]; then               gcd_result=${i}          fi       fi      i= ' expr ${i} + 1 '    done    lcm_result= ' expr  $s _small /  $GCD _result '  lcm_result= ' expr  $LCM _result \*   $s _great '     #echo -e  "\033[31m  two numbers greatest common divisor for $s_great \033[0m"} function say ()  {    divisor   echo -e  "\033[31m  two numbers greatest common divisor for $gcd_result \033[0m"}# Define a least common multiple function function multiple ()  {   divisor      echo  -e  "\033[31m  Two numbers least common multiple for $lcm_result \033[0m"}function main ()  {  echo   "---------------------------"   echo  "Enter the method you want to perform"   echo  "Input 1: Perform the Add function and return the sum of two"   echo  "Input 2: Execute greatest common divisor function, return two number greatest common divisor"   echo  "Input 3: Execute least common multiple function, return two number least common multiple"   echo   "Input 4: Exit"   read input  case  $input  in  1)   sum;;   2)   say;;   3)   multiple;;   4)   exit;;   esac }if [ $# != 2 ];then   echo  "command format is not,  Command format:   SH D.SH NUM1&NBSp;num2 "   exitfi# Determines whether the input is a number num= ' Expr $1 + 0 &>/dev/null ' if the returned state  [ $? -ne 0 ];then   echo  "num1  must be a number format"     exitfinum= ' Expr $2 + 0 &>/dev/null ' If [ $? -ne 0 ];then    echo  "num2  must be number format" fi# Display selection menu while truedo  num1=$1  num2=$ 2  maindone

Shell Calculation Tool Source code