kelime sayan program

#include <stdio.h>
#include <string.h>
int plm(char *a){
    int i,i2;
    int sayac=0;
    for(i=0,i2=1;i<strlen(a)&&i2<strlen(a);i++,i2++){
        if(a[i]==' '){
            if(a[i2]!=' ')sayac++;
        }
    }
    return sayac+1;
}
int main(){
    char *plm2="asdf";
    printf("%d\n",plm(plm2));
    getchar();
}