C Programming Tutorial - 2

Tutorial 6 Linked List Example:
typedef struct product{
    const char * name;
    float price;
    struct product *next;
} product;

void printLinkedList(product *pProduct){
    while(pProduct != NULL){
        printf("A %s costs %.2f\n\n", (*pProduct).name, pProduct->price);
        pProduct = pProduct->next;
    }
}
int main()
{
    product tomato = {"Tomato", .51, NULL};
    product potato = {"Potato", 1.21, NULL};
    product lemon = {"Lemon", 1.69, NULL};
    product milk = {"Milk", 3.09, NULL};
    product turkey = {"Turkey", 1.86, NULL};

    tomato.next = &potato;
    potato.next = &lemon;
    lemon.next = &milk;
    milk.next = &turkey;

    product apple = {"Apple", 1.58, NULL};

    lemon.next = &apple;
    apple.next = &milk;

    printLinkedList(&tomato);
    return 0;

}
Tutorial 7 Strings and Functions
void makeLower(char * theString){
    int i = 0;
    while(theString[i]){
        theString[i]= tolower(theString[i]);
        i++;
    }
}
int main()
{

    _Bool isaNum = 1;
    int num;
    int sumofnum=0;

    do{
    printf("Enter a number:");
    isaNum = (scanf("%d", &num)==1);
    if(isaNum)  sumofnum += num;
    } while( isaNum );
    printf("The Sum is: %d\n\n", sumofnum);

    char theChar;
    while((theChar = getchar())!='~'){
        putchar(theChar);
    }

    char name[50];
    printf("What is your name?");
    fgets(name, 50, stdin);
    fputs("Hi ", stdout);
    fputs(name, stdout);
    return 0;
}
Tutorial 8 Malloc()
struct product{
    float price;
    char productname[20];
};
int main(){
    struct product * pProducts;
    int i, j;
    int numofPro;
    printf("Enter the number of products to store:");
    scanf("%d", &numofPro);
    pProducts = (struct product*) malloc(numofPro *sizeof(struct product));
    for(i = 0; i<numofPro; i++){
        printf("Enter a product name:");
        scanf("%s", &(pProducts+i)->productname);
        printf("Enter a product price:");
        scanf("%f", &(pProducts+i)->price);
    }
    printf("Products Stored\n");
    for(i = 0; i<numofPro; ++i){
        printf("%s\t%.2f\n", (pProducts+i)->productname, (pProducts+i)->price);
    }

    free(pProducts);
    return 0;
}