marxxt

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

int main(){

        char s[] = "2 3 1 2 3 1 2 3";
        char key = '\x20';
        char *p;
        int result = 0;

        p = strchr(s, key);

        while(p != NULL){
                result++;
                p = strchr(p + 1, key);
        }

        printf("%d\n", result);

        return 0;
}