Question

Can you write the shell scripts for these C files (code in C):

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main(int argb, char *argv[]){
char ch;
int upper=1;
if(argb>1){
if(strcmp(argv[1],"-s")==0){
upper=1;
}
else if(strcmp(argv[1],"-w")==0){
upper=0;
}
}
while((ch=(char)getchar())!=EOF){
if(upper){
printf("%c",toupper(ch));
}
else{
printf("%c",tolower(ch));
}
}
return 0;

}

========================================================

#include <stdio.h>
#include <stdlib.h>

int calcRange(int array[],int size){
int max=array[1];
int min=array[0];
int a=0;
for(a=1;a<size;a++){
if(array[a]>max){
max=array[a];
}
}
for(a=1;a<size;a++){
if(array[a]<min){
min=array[a];
}
}
printf("%d-%d=%d\n",max,min,max-min);
}

int main(int arga, char **argv){
int i;
if(arga>1){
int array[arga];
for(i=1;i<arga;i++){
array[i]=atoi(argv[i]);
}
int range=calcRange(array,arga);
printf("range=%d\n",range);
}
}

Answer 1

Please find the requested scripts below.

Please provide your feedback
Thanks and Happy learning!

#!/bin/bash
#Above line sets the environment for the script to bash

#Check for the command line argument
if [ $# -eq 1 ]
then
    if [ "$1" == "-s" ]
    then
       upper=1;
    elif [ "$1" == "-w" ]
    then
       upper=0;
    else
        echo "Invalid argument $1. Valid values are -s and -w"
        exit 0
    fi
else
    echo "There should be exactly one command line argument. Valid argument values are -s or -w"
    exit 0;
fi

#Press ctrl D for EOF character
while read ch
do
    if [ $upper -eq 1 ]
    then
        #Convert the character to upper case
        echo `echo "$ch" | tr [a-z] [A-Z]`
    else
        #Convert the character to lower case
        echo `echo "$ch" | tr [A-Z] [a-z]`
    fi
done

#!/bin/bash
#Above line sets the environment for the script to bash

calcRange()
{
        # Shift all arguments to the left (original $1 gets lost)
        shift;
        # Rebuild the array after excluding the first argument(ie array size)
    arr=("$@")
        max=${arr[1]}
        min=${arr[0]}
        
        #find the max element from the array
    for i in "${arr[@]}"
    do
            if [ $i -gt $max ]
                then
                   max=$i
                fi
    done
        
    #find the min element from the array
    for j in "${arr[@]}"
    do
            if [ $j -lt $min   ]
                then
                   min=$j
                fi
    done
    
        range=`expr $max - $min`
    echo "$max-$min=$range"
}

#Check for the command line argument
if [ $# -gt 1 ]
then
    k=0;
    for i in $@
        do
        myArr[k]=$i
        k=`expr $k + 1`
        done
else
    echo "There should be more than one command line argument."
    exit 0;
fi

calcRange "${myArr[@]}"