remvocals.c

#include<stdlib.h>

int main(int argc, char *argv[]){
  //Checking if the user put in correct number of arguments.
  if (argc != 3){
     printf("Invalid number of arguments.\n");
     exit(1);
    }

  FILE *fp1;
  FILE *fp2;

  fp1 = fopen(argv[1], "rb");
  //Checking if the file opened correctly
  if (fp1 == NULL){
      perror("fopen");
      exit(1);
     }
  char numbers[44];
  short num[2];

  //Reading file
  //arg1 = pointer to file where read stuff is stored
  //arg2 = Size of the element: in this case char (size=1)
  //arg3 = number of elements: here 44 elements coz 44 X 1 = 44 bytes
  //arg4 = file name to be read

  fread(numbers, sizeof(char), 44, fp1);
  fp2 = fopen(argv[2], "wb");
  fwrite(numbers, sizeof(char), 44, fp2);

  size_t input1 = fread(&num[0], sizeof(short), 1, fp1);
  size_t input2 =fread(&num[1], sizeof(short), 1, fp1);

  short new = (num[0] - num[1])/2;

  fwrite(&new, sizeof(short), 1, fp2);
  fwrite(&new, sizeof(short), 1, fp2);

  while(input1 != 0 && input2!=0){
     input1 =fread(&num[0], sizeof(short), 1, fp1);
     input2 =fread(&num[1], sizeof(short), 1, fp1);
     new = (num[0] - num[1])/2;
     fwrite(&new, sizeof(short), 1, fp2);
     fwrite(&new, sizeof(short), 1, fp2);
       }
  fclose(fp1);
  fclose(fp2);
  return 0;
  }