Hi, I need help with this problem. I\'m supposed to create a vector calculator..

Question

Hi, I need help with this problem.

I'm supposed to create a vector calculator...well not really.

We're supposed to create functions and test them with TDD (Test Driven Development) and only implement the functions I have in this code.

I'm having problems allocating a new data structure(Vector).

Can anyone help?

#include <assert.h> // assert macro
#include <cstdlib>
#include <stddef.h> // size_t, NULL
#include <stdio.h>  // FILE, *printf, *scanf, fopen,...
#include <stdlib.h> // calloc, free, rand, *sort, ...
#include <string.h> // str???, bcopy, bzero, ...

using namespace std;

//==================================================================================

// Elem is a value that the user enters for the vector calculator
typedef int Elem;

//==================================================================================

// Contains an unsigned integer field for recording size of vector, plus a pointer to dynamic allocated array
typedef struct {
    unsigned int Vec_size;        // Size of the Vector
    float *Vec;                    // Pointer to a dynamically allocated array
}Vector;


//==================================================================================

// print_vec:
//   print vectors to a file descriptor.
// In:
//
// Out:
//   Vectors printed to screen
void print_vec(Vector *newVector) {
    for (unsigned int i = 0; x < newVector->Vec_size; i++){
        printf(" %f", newVector->Vec[i]);
    }
}

//==================================================================================

// alloc_vec
//   Allocate an empty vector
// In:
//  
// Out:
//   return -- Vector with empty elements
Vector *alloc_vec(void) {
    Vector *newVector = new Vector;
    if (NULL == newVector)
        return NULL;
   
}

//==================================================================================

// dealloc_vec
//   frees the memory
// In:
//  
// Out:
//   Memory is deallocated
//   No return value.
void dealloc_vec(Vector *) {
}

//==================================================================================

// Instruct user on how to use this program; i.e. the commands it
// supports and the syntax of those commands.
// In:
//    none
// Out:
//    output produced on standard output
void help_vec(void) {
    puts( " Usage:" );
    puts( "  p   - print vector" );
    puts( "  q,e - quit, end" );
    puts( "  h   - print usage help" );
    puts( "  + <operand> - add <operand> to each element of vector" );
    puts( "  - <operand> - subtract <operand> from each element of vector" );
    puts( "  * <operand> - multiple each element of vector by <operand>" );
    puts( "  / <operand> - divide each element of vector by <operand>" );
    puts( "  a <value> - extend vector by additional value" );
}

//==================================================================================

// main:
//  Program entry point
// In:
//
//
// Out:
//  return -- EXIT_SUCCESS if program terminates normally,
//            EXIT_FAILURE otherwise
int main(int, char**) {
   
   
return EXIT_SUCCESS;
}

Explanation / Answer

i thing the alloc_vec function is wrong this is the correct bcs u create newVector but u don't return the poiter of newVector. Vector *alloc_vec(void) { Vector *newVector = new Vector; if (NULL == newVector) return NULL; else return newVector; }

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