text: #include "stdio.h"
  #include "stdlib.h"
  #include "complex_calculator.h"
  
  error_t complex_sum(complex_t* cnum1, complex_t* cnum2, complex_t* csum)
  {
      if(NULL == cnum1 || NULL == cnum2)
          return ERROR_NULL_PTR;
      
      
      csum->real = cnum1->real + cnum2->real;
      csum->imaginary = cnum1->imaginary + cnum2->imaginary;
  
      return SUCCESS;
  
  }