Another sscanf() question.

[caduardo21]

#include <stdio.h>

void valid_buy(int *, char *, float *);

int main()
{
    int quantity = 0;
    char description[80];
    float price = 0;

    valid_buy(&quantity, description, &price);

    printf("Quantity: %d\nDescription: %s\nPrice: %f\n", quantity, description, price);

    return 0;
}

void valid_buy(int *quantity, char *description, float *price)
{
    char line[]= "1,blue car,2500.00";

    /* I know I'm ignoring the return value of sscanf() but it's just for now */
    sscanf(line, "%d, %49[^,], %f", &quantity, description, &price);
}

The string "blue car" gets assigned to variable description. However, int quantity and float price still have the value of 0, Why?

[pianorain]

void valid_buy(int *quantity, char *description, float *price)
{
    char line[]= "1,blue car,2500.00";

    /* I know I'm ignoring the return value of sscanf() but it's just for now */
    sscanf(line, "%d, %49[^,], %f", &quantity, description, &price);
}

Note that quantity and price are already pointers. You don't need the address of the pointer. Try instead:

sscanf(line, "%d, %49[^,], %f", quantity, description, price);

[Prelude]

quality and price are already pointers, you can safely remove the address-of operator:

sscanf(line, "%d, %49[^,], %f", quantity, description, price);

[Salem]

Now you know why "gcc -Wall" is a good idea.