char heap[ 134 ];
char *firstFree = heap;

char *allocMem( int size ) {
        if ( size >= 0){
                void *malloc(size_t sizeofint);
                /*allocate space for an array with size number of elements of type int*/
                char * ip = malloc(sizeof(int) * size); 
                if(ip == '\0'){ /*If function is null, memory not allocated so exit*/
                        return '\0';
                }else{ /*Otherwise return address of first free space*/
                        firstFree = ip+1;
                        return firstFree;
                }
                        }
        else {
                printf("ERROR: Cannot allocate negative memory");
        }
        return 0;
}

void dumpHeap( void ) {
        char letter;
        int counter = 0;
        int i;
        for (i=0; i < *firstFree; i++){
                letter = heap[i];
                printf ("%c   ",(char) letter);
                counter++;
                if(counter==10){
                        counter = 0;
                        printf("\n");
                        }
        }
        printf("\n");
}