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.SUFFIXES:.c .o    
CC=gcc
SRCS=filerw.c

OBJS=$(SRCS:.c=.o)
EXEC=demo


start: $(OBJS)
    $(CC) -o $(EXEC) $(OBJS)
    @echo '@_@@_@@_@@_@@_@@_@@_@@_@  ok  @_@@_@@_@@_@@_@@_@@_@@_@'

.c.o:
    $(CC) -Wall -g -o $@ -c $<

clean:
    rm -f $(OBJS)

struct person
{
    int id;
    char name[20];
    int age;
    int sex;
    char tel[20];
};


int main(int arg, char *args[])
{
    FILE *p = fopen(args[1], "w");
    if (p == NULL)
    {
        printf("error is %s\n", strerror(errno));
    } else
    {
        printf("success\n");
        struct person man;
        memset(&man, 0 ...

int main(int arg, char *args[])
{
    if (arg <2)
        return 0;

    DIR *dp;
    struct dirent *dirp;
    dp = opendir(args[1]);
    if (dp == NULL)
    {
        printf("error is %s\n", strerror(errno));
        return 0;
    }

    while((dirp = readdir(dp)) != NULL)
    {
        printf("%s\n", dirp->d_name);

    }

    closedir(dp);

    return 0;
}