Question

Programming Assignment #2

EE 2372

MAKE SURE TO FOLLOW INSTRUCTIONS CAREFULLY, IF YOU HAVE ANY DOUBTS PLEASE EMAIL ME!

This programming assignment will just be a small extension to programming assignment 1. In the first assignment each of the functions could only take a predefined number of inputs. This time the objective is to be able to complete these functions with any amount of inputs.

The user will pass arguments through the command line (this means you will have to use argc and argv) then complete the desired function based on the arguments provided.

Example input:

./myExec D 23.1 4 25 57.2

Addition (A or a):

This function will now take all the numbers provided by the user and add them.

The printed statement should read as follows:

“The result of addition is {answer}”

Subtraction (S or s):

This function will now take the first number provided and subtract the rest.

The printed statement should read as follows:

“The result of subtraction is {answer}”

Multiplication (M or m):

This function will now multiply all the numbers provided.

The printed statement should read as follows:

“The result of multiplication is {answer}”

Division (D or d):

This function will take the first number then divide it by the rest.

The printed statement should read as follows:

“The result of division is {answer}”

Prime Function (P or p):

This function will now print out true or false for each input on the same line.

The printed statement should read as follows (assuming 3 numbers are passed):

“{True or False} {True or False} {True or False}”

Deliverables:

Upload your program onto blackboard as a “{first_name}_{last_name}_a1.c” file and make sure that it compiles using gcc. Be sure that your program follows the exact specifications, or you will lose points. Also, your code must be well commented with a comment at the beginning of your file that contains your name, ID number and the course (EE 2372). The format should look like this:

My Name

ID Number

EE 2372

Point Distribution:

Follows the naming specification (5%)

Good comments (5%)

Each function works (90%)

***NOTE***

If your code does not compile using gcc with the command

“gcc {first_initial}_{last_name}_a1.c -o assignment1” then you will receive reduced credit.

Also make sure that all printed statements are in their own line at the end or you it will be marked as incorrect.

***END OF NOTE***

//
//ID:
//EE 2372

//intialized with Standard I/O header
#include<stdio.h>
#include<math.h>
//Entry point of the C program
void main()
{
//Initialized variables (floats, integers, and charactes)
float a, b;
int c, i, r=0;
char command;
//Ask's user for an input character which will determine opperation that would run 
printf("Pick a function: (a)dd, (s)ubstract, (m)ultiply, (d)ivide, (p)prime ");
scanf("%c",&command);

        //if statement for user input of addition
        if(command =='a'||command == 'A'){
                printf("Enter a number: ");
                //program asks and recieves user input for the first number
                scanf("%f", &a);
                printf("Enter a number: ");
                //program asks and recieves user input for the second number
                scanf("%f", &b);
                //Executes mathematical funcion and prints results
                printf("The result of addition is %f\n",a+b);

//for the exectutions of (s, m, and d) functions and executions are identical to the addition, except for the mathematical function that is done
}
        //if statement for user input of subtraction
        if(command == 's'||command == 'S'){
                printf("Enter a number: ");
                scanf("%f", &a);
                printf("Enter a number: ");
                scanf("%f", &b);
                printf("The result of subtraction is %f\n",a-b);
}
        //if statement for user input of multiplication
        if(command == 'm'||command =='M'){
                printf("Enter a number: ");
                scanf("%f", &a);
                printf("Enter a number: ");
                scanf("%f", &b);
                printf("The result of multiplication is %f\n",a*b);
}
        //if statement for user input of division
        if(command == 'd'||command =='D'){
                printf("Enter numerator: ");
                scanf("%f", &a);
                printf("Enter an denomiator: ");
                scanf("%f", &b);
                printf("The result of division is %f\n",a/b);
}
        //if statement for user input of the prime function
        if(command == 'p'||command =='P'){
                printf("Enter a number: ");
                scanf("%d", &c);
                //for loop for determining prime numbers
                for( i = 1; i<= c; i++)
                {
                        if(c%i==0){
                                r++;
                                }
}
                //Result is taken into an if-else statement with an output of truth or false resulting wether the number is prime or not
                if(r==2){
                        printf("\nTrue\n");
                        }
                else{
                        printf("\nFalse\n");
}
}
}

Answer 1

Code

#include<stdio.h>
#include<math.h>
#include <stdlib.h>
//Entry point of the C program
void main(int argc, char *argv[])
{
   //Initialized variables (floats, integers, and charactes)
   float ans=0;
   int num;
   int countArgc, i,check;
   char command;
   command=argv[1][0];
   countArgc=argc-2;
   if(command =='a'||command == 'A')
   {
       for(i=2;i<argc;i++)
           ans+=atof(argv[i]);
       printf("The result of addition is %.2f\n",ans);
   }
   else if(command =='s'||command == 'S')
   {
       ans=atof(argv[2]);
       for(i=3;i<argc;i++)
           ans-=atof(argv[i]);
       printf("The result of subtraction is %.2f\n",ans);
   }
   else if(command =='m'||command == 'M')
   {
       ans=1;
       for(i=2;i<argc;i++)
           ans*=atof(argv[i]);
       printf("The result of multiplication is %.2f\n",ans);
   }
   else if(command =='d'||command == 'D')
   {
       ans=atof(argv[2]);
       for(i=3;i<argc;i++)
           ans/=atof(argv[i]);
       printf("The result of subtraction is %.2f\n",ans);
   }
   else if(command =='p'||command == 'P')
   {
       for(i=2;i<argc;i++)
       {
           check=checkPrimeNumber(atoi(argv[i]));
           if(check==0)
               printf("{True} ");
           else
               printf("{False} ");
       }
       printf("\n");
   }
}
int checkPrimeNumber(int n)
{
int j, flag = 1;
for(j=2; j <= n/2; ++j)
{
if (n%j == 0)
{
flag =0;
break;
}
}
return flag;
}

output

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