The test printf's work. However the printfs in the main for the totals display zero always. Any ideas as to why the value doesnt seem to pass to tp_dollars and tp_pounds?Code:#include <stdio.h> double calculate_tp(int quantity, double up_dollars, double up_pounds, double *tpa, double *tpb); int main(void) { char again; double up_dollars = 30.0, up_pounds = 15.0; /*Unit price*/ int quantity; double tp_dollars,tp_pounds; /* Total price */ for (again = 'y'; again != 'n'; scanf(" %c",&again)){ printf("Unit cost is %.2lf dollars or %.2lf pounds \n",up_dollars,up_pounds); printf("Enter quantity>"); scanf(" %d",&quantity); printf("Quantity %d \n \n",quantity); calculate_tp(quantity,up_dollars,up_pounds,&tp_dollars,&tp_pounds); printf("Total in dollars %.2lf \n",&tp_dollars); printf("Total in pounds %.2lf \n \n",&tp_pounds); printf("Run program again?"); } return(0); } double calculate_tp(int quantity, double up_dollars, double up_pounds, double *tpa, double *tpb) { *tpa = quantity * up_dollars; printf("Test print total dollars %.2lf \n",*tpa); *tpb = quantity * up_pounds; printf("Test print total pounds %.2lf \n",*tpb); }
The program doesnt really make much sense but I'm just trying to learn using pointers with functions.
