stream into

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int main(int argc, char *argv[])
{
    FILE *fp;
    char str[255], *p;
    int i;

    if(argc!=2)
    {
        printf("Specify file name.\n");
        exit(1);
    }

    if((fp=fopen(argv[1], "w"))==NULL)
    {
        printf("Can't open file.\n");
        exit(1);
    }

    printf("Enter text:");
    gets(str);
    p=str;

    while(*p)
    {
        if(fputc(*p, fp)==EOF)
        {
            printf("Error writing file.\n");
            exit(1);
        }
        p++;
    }
    fclose(fp);

    if((fp=fopen(argv[1], "r"))==NULL)
    {
        printf("Can't open file.\n");
        exit(1);
    }

    for(;;)
    {
        i=fgetc(fp);
        if(i==EOF)
            break;
        putchar(i);
    }
    fclose(fp);
    return 0;
}