//programme of counting number of words in a string
char* remove_extra_spaces(char *s);
int count_words(char *S);
main()
{
    char str[100];
    int no_of_words;
    printf("Enter a string\n");
    gets(str);
    printf(" \nString length with extra spaces is:%d",strlen(str));
    no_of_words=count_words(str);
    printf("\n Number of Words with extra spaces is : %d",no_of_words);


    strcpy(str,remove_extra_spaces(str));
    printf(" \nString length:%d",strlen(str));
    no_of_words=count_words(str);
    printf("\n Number of Words : %d",no_of_words);
    getch();
}
int count_words(char *s)
{
    int i=0,count=0;
    while(*(s+i)){
        if(*(s+i)==' ')
            count++;
        i++;
    }
    return(count+1);
}
char* remove_extra_spaces(char *s)
{
    char *p;
    int i=0,j=0;
    p=malloc(strlen(s)+1);
    while(*(s+i)){
        while(*(s+i)==' ')
            i++;
        while(*(s+i)!=' '&& *(s+i)!='\0')
        {
            *(p+j)=*(s+i);
            i++;j++;
        }if(*(s+i)=='\0'&& *(p+j-1)==' ')
        j--;
        *(p+j)=*(s+i);
        j++;

    }return(p);
}