word counting program in C

wc.c

#include<stdio.h>
#include<string.h>
#include<ctype.h>


struct node{
    int num;
    char *p;
    struct node *next;
};


int main(int argv,char *argc[]){
    FILE *fp;
        char str[1000];
        if((fp=fopen("test.c","rt"))==NULL){
            printf("Canot open file strike any key to exit!");
            getchar();
            exit(1);}
        fread(str,4,1000,fp);
        fclose(fp);
        int i;
        char *str1=str;

//¶ÁÊýŸÝÓöµœœáÊø·ûÌáÇ°œáÊø£¬œÚÊ¡ÄÚŽæ¿ÕŒä

        for(i=0;i<1000;i++){
            if(str[i]=='\0')
            break;}

        i=0;

//tap ŒÇŒǰһ×Ö·û׎̬£¬1Ϊ·Ç×ÖÄž£¬2Ϊ×ÖÄž;

    int tab=1;
    char *temp=str1;

//º¯ÊýÉùÃ÷

    struct node*Add();
    struct node*Head=NULL;

    while(str[i]!='\0'){
           if((isalpha(str[i])==0)&&(tab==1)){
                str[i]='\0';
                   i++;
                str1++;
                tab=1;}
    
            else if((isalpha(str[i])==0)&&(tab==2)){
                str[i]='\0';
                i++;
                Head=Add(Head,temp);
                str1++;
                tab=1;}
    
            else if((isalpha(str[i])!=0)&&(tab==1)){
                temp=str1;
                i++;
                tab=2;
                str1++;}
    
            else if((isalpha(str[i])!=0)&&(tab==2)){
                i++;
                tab=2;
                str1++;}}
    
    printf("The words data:\n");
    struct node* temp1=Head;

        while(temp1!=NULL){
            printf("Word(s):%s\t,Number:%d\n",temp1->p,temp1->             num);
            temp1=temp1->next;}
        return(0);
}


struct node* Add(head,word)
struct node* head;
char* word;{
    struct node *p1,*p2;
    p1=(struct node*) malloc(sizeof(struct node));
    p1->num=1;
    p1->p=word;
    p2=head;

        if(head==NULL){
            head=p1;
            p1->next=NULL;
            return(head);}
    
        while(p2->next!=NULL){
            if(strcmp(p2->p,p1->p)==0){
                    p2->num++;
                    return(head);}
            p2=p2->next;}

    if(strcmp(p2->p,p1->p)==0){
               p2->num++;
                return(head);}

        p2->next=p1;
        p1->next=NULL;
        return(head);
}