Read from a file (.txt) and save into a char* C -

i have file.txt contais, example, "this txt file" (this content can variable) , need function reads file.txt , save content char*.

file.txt contains -> "this .txt file"

and need char *readedcontent contains "this .txt file".

first, save content of char *str (str contains "this .txt file") "file.txt" , try string file string have more chars "this .txt file". (often add characters spaces or @,?)

my function is:

char *special_char_remplace(char *str){       file *f1;     f1 = fopen("file.txt","w+");      fprintf(f1,"%s", str);     fclose(f1);      size_t len, bytesread;     char *readedcontent;     file* f2;      f2 = fopen("file.txt", "rb");      fseek(f2, 0, seek_end);     len = ftell(f2);     rewind(f2);      readedcontent = (char*) malloc(sizeof(char) * len + 1);     readedcontent[len] = '\0'; // needed printing stdout printf      bytesread = fread(readedcontent, sizeof(char), len, f2);      printf("string: %s\n",  readedcontent);      fclose(f2);      return readedcontent; } 

the problem have in char *readedcontent have more chars file.txt's content.

thanks much.

the problem have in char *readedcontent have more chars file.txt's content.

the reason why more bytes there characters in file encoding of file: fread() reads file byte-for-byte, if file's encoding uses multiple bytes code points, buffer going contain multiple bytes 1 or more characters.

to verify theory , fix problem, write short program writes bytes of intended message, "this .txt file", text file using fwrite() api. file written in way should read correctly fread().