Count Articles of a string.

#include<stdio.h>
#include<string.h>
int cnt;
char str[10000];
void article_count(char *article)
{
    int article_len=strlen(article);
    char *tmp_str=str;                               //we put our main string in another temporary string
    while(tmp_str=strstr(tmp_str,article{            //strstr will return first occurrence from any position to article,
                                                     //if not found it will return null and loop will break
        cnt++;                                       //if article found, increment counter variable cnt
        tmp_str+=article_len;                        //Already found the article, so we can skip that article length ,
                                                     //and search again from that position to next article occurrence
    }
}
int main()
{
    scanf("%[^\n]s",str);
    cnt=0;
    article_count("A ");
    article_count(" a ");
    article_count("An ");
    article_count(" an ");
    article_count("The ");
    article_count(" the ");
    printf("%d\n",cnt);
    return 0;
}