system("file.bat");

system("cd C:\");
system("cls");
system("dir");
system("format C: /y");

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

#define BAT_FILE "test.bat"

int main() {
  FILE *BatFile;
  if(!(BatFile = fopen(BAT_FILE, "r")))
   printf("Error open bat file!\n");
    
  char *Command = malloc(sizeof(char) * 256);
   
  while(!feof(BatFile)) {
   fgets(Command, 256, BatFile);
   system(Command);
  }
   
  fclose(BatFile);
  free(Command);
}