Исправить ошибку компиляции: [Build error] Error1 - C (СИ)

#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>
int i,m,n;
char a[100],b[100];
char name1[BUFSIZ], name2[BUFSIZ];
char x;
FILE *f, *f1;
//------------------------------------------------------------------
// ГЋГ±Г*îâГ*Г*Гї ïðîãðГ*ììГ* ----------------------------------------------
void main()
 
{
 
  printf("This program delete each n-th repeating if input sybol \n");
  while(f == NULL)
   {
    printf("Enter file name ");
    scanf("%s", name1);
    f = fopen(name1, "r");
    if (f == NULL)     
      printf("Oshibka otkririya\n");
   }
  printf("Enter symbol");
  scanf("%c", x);
  printf("Enter n");
  scanf("%d", n);
  
//------------------------------------------------------------------
// Âûâîä ñîäåðæèìîãî òåêñòîâîãî ГґГ*éëГ* Г*Г* ГЅГЄГ°Г*Г*
  printf("\n Soderjimoe faila:\n\n");
  while(!feof(f))
    {
     fgets(a,100,f);
     printf("%s",a);
    }
  fseek(f,0,SEEK_SET);
//------------------------------------------------------------------
// Ïîèñê Г§Г*Г¤Г*Г*Г*îãî ñèìâîëГ* ГЁ ГіГ¤Г*ëåГ*ГЁГҐ
     m=0
     while (!feof(f))
        {
           fgets(a,100,f);
           for (i=0; i<strlen(a); i++)
             { 
               if (a[i]=x) 
                  m++; 
               if (a[i]!=x)  
                  b=b+a[i];
               if (m=n) 
                  m=0;
        }       
//------------------------------------------------------------------
// Âûâîä ðåçóëüòГ*ГІГ* Г*Г* ГЅГЄГ°Г*Г*
  printf("\n\n Rezult:");
  for (i=0; i<strlen(b); i++)
     printf("%c",b[i]);
  printf("\n V nem bukv: %d",jmax+1); 
  fclose(f);
//------------------------------------------------------------------
// Âûâîä ðåçóëüòГ*ГІГ* Гў ГґГ*éë
  printf("\n\n Enter filename of rezult file \n");
  scanf("%s", name2);
  f1=fopen(name2,"a");
  for (i=0; i<strlen(b); i++)
     fprintf(f1,"%c",b[i]);
  fclose(f1);
  printf("Rezultat sohranen.");
  getch();
}