#include <stdio.h>

char ringbuffer[9][9]; //char matrix with size for 10char strings
char myc1 ='h';
char myc2 ='w';
int nextToPut=0;
int nextToGet=0;
int nbrOfElements=0;

void put(char c){
        int pos=0;
        if(c!='\0'){
                ringbuffer[nextToPut][pos]=c;
                pos++;
                nextToPut++;
        }
}

char* get(void){
        int pos=0;
        if(nextToGet>0)
                if(ringbuffer[nextToGet]!=NULL){
                        nextToGet--;
                        return ringbuffer[nextToGet];
                }

}

int main(){
        char* pChar;
        int i=0;
        put(myc1);
        pChar=get();
        printf("char is :%s\n",pChar);

}

Output:
char is :(null)