Stdio h C Tutorial

Value Item
Header filestdio.h
Declarationint fputc(int ch, FILE *stream);
Functionwrites the character 'ch' to the stream.
Returnreturns the value of the character written on success or EOF on failure.
For binary operations, you can use ferror() to determine whether an error has actually occurred.

#include 
  #include 
  int main(void)
  {
    FILE *fp;
    if((fp=fopen("test", "wb"))==NULL) {
      printf("Cannot open file.\n");
      exit(1);
    }
    char *str = "www.rntsoft.com";
    while(*str){
         if(!ferror(fp)) {
              fputc(*str++, fp);
         }
    }
 
    fclose(fp);
  }