Ttykuu

I created my brainfuck interpreter and I would like to know what can be done better and is the code clear and readable. I will be very thankful for opinions and suggestions.
Here is the code:

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

#define ALLOCATION_ERROR 1
#define FILE_ERROR 2
#define OTHER_ERROR 3
#define TAPE_SIZE 30000

int main(int argc,char** argv)
 if(argc!=2)
 puts("Usage: main <source>");
 exit(OTHER_ERROR);
 
 unsigned char* tape=calloc(TAPE_SIZE,1);
 if(tape==NULL)
 fprintf(stderr,"Fatal: failed to allocate %zu bytes.n",(size_t)TAPE_SIZE*1);
 exit(ALLOCATION_ERROR);
 
 unsigned char* tape_ptr=tape;
 FILE* input_file=fopen(argv[1],"rb");
 if(input_file==NULL)
 fprintf(stderr,"Error: failed to open file %sn",argv[1]);
 exit(FILE_ERROR);
 
 fseek(input_file,0,SEEK_END);
 size_t code_size=(size_t)ftell(input_file);
 fseek(input_file,0,SEEK_SET);
 unsigned char* code=malloc(code_size+1);
 if(code==NULL)
 fprintf(stderr,"Fatal: failed to allocate %zu bytes.n",code_size+1);
 exit(ALLOCATION_ERROR);
 
 if(fread(code,1,code_size,input_file)!=code_size)
 fprintf(stderr,"Error: failed to read from file %sn",argv[1]);
 exit(FILE_ERROR);
 
 code[code_size]=0;
 for(unsigned char* code_ptr=code;*code_ptr;++code_ptr)
 switch(*code_ptr)
 case '>':
 ++tape_ptr;
 break;
 case '<':
 --tape_ptr;
 break;
 case '+':
 ++*tape_ptr;
 break;
 case '-':
 --*tape_ptr;
 break;
 case ',':
 *tape_ptr=(unsigned char)getchar();
 break;
 case '.':
 putchar(*tape_ptr);
 fflush(stdout);
 break;
 case '[':
 if(!*tape_ptr)
 int loop=1;
 while(loop)
 ++code_ptr;
 if(*code_ptr=='[')
 ++loop;
 if(*code_ptr==']')
 --loop;
 
 
 break;
 case ']':
 if(*tape_ptr)
 int loop=1;
 while(loop)
 --code_ptr;
 if(*code_ptr=='[')
 --loop;
 if(*code_ptr==']')
 ++loop;
 
 
 break;
 
 
 free(tape);
 free(code);