Assistance needed with pointers and arrays - c

Question

Ok, so I am writing a program that reads input from a file and puts them into arrays. I am trying to use pointers with arrays so I can point to a certain spot in an array and add a user defined float to the float that already exists.
This is my code so far:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int menu1();
int main()
{
FILE * ifp = fopen("input2.txt","r"); //Open the input file
int cars = 5, i , j, k; // Initialized cars and counters i, j, and k
char *VIEW="VIEW", *BID="BID", *CLOSE="CLOSE", choice1[20]; //Initialize character arrays
float START_BID[5]={0.00}, MIN_BID[5]={0.00}, CUR_BID[5]={0.00}, USR_BID[5]=0.00};
int compareLimit = 100, selection=0;
//Scan the file and appropriate the numbers into their respective arrays
for (i = 0; i < cars; i++)
{
fscanf(ifp, "%f %f", &START_BID[i],&MIN_BID[i]);
}
printf("Welcome to the Silent Auction\n\n");
menu1(); //Display the menu
scanf("%s", &choice1); //
int result = strncmp(choice1, VIEW, compareLimit); //Compare two strings
if(result == 0)
{
selection = selection + 1;
}
int result2 = strncmp(choice1, BID, compareLimit); //Compare two strings
if(result2 == 0)
{
selection = selection + 2;
}
int result3 = strncmp(choice1, CLOSE, compareLimit); //Compare two strings
if(result3 == 0)
{
selection = selection + 3;
}
while (selection < 3)
{
if (selection == 1)
{
printf("Number\tCurrent Bid\tMinimum Increase\n");
printf("1\t$%.2f\t\t$%.2f\n",CUR_BID[0], MIN_BID[0]);
printf("2\t$%.2f\t\t$%.2f\n",CUR_BID[1], MIN_BID[1]);
printf("3\t$%.2f\t\t$%.2f\n",CUR_BID[2], MIN_BID[2]);
printf("4\t$%.2f\t\t$%.2f\n",CUR_BID[3], MIN_BID[3]);
printf("5\t$%.2f\t\t$%.2f\n",CUR_BID[4], MIN_BID[4]);
menu1();
scanf("%s", &choice1);
}
else if (selection == 2)
{
int k;
float usr_bid;
printf("Which auction would you like to bid on? (1-5)\n");
scanf("%d", k);
if (CUR_BID[k - 1] = 0.00)
MIN_BID[k - 1] = START_BID[k - 1];
else
MIN_BID[k - 1] = CUR_BID[k - 1] + MIN_BID[k - 1];
printf("The minimum bid is %.2f\n", MIN_BID[k - 1]);
printf("How much would you like to bid?\n");
scanf("%f", usr_bid);
if (usr_bid < MIN_BID[k-1])
printf("Sorry, that bid is not high enough.\n");
else
CUR_BID[k - 1] = usr_bid + CUR_BID[k - 1];
menu1();
scanf("%s", &choice1);
}
else
{
int i;
int auction = 1;
for (i=0; i < cars; i++)
{
for (auction = 1; auction < cars; auction++)
{
while (CUR_BID[i]!= 0.00)
printf("Auction %d sold for $%.2f", auction, CUR_BID);
}
}
}
}
fclose(ifp);
return 0;
}
int menu1()
{
printf("Please make a selection (In all caps):\n");
printf("\tView Auctions [VIEW]\n");
printf("\tBid on an Auction [BID]\n");
printf("\tClose Auctions [CLOSE]\n");
}
My program works up to the while loop where else if (selection == 2) is. It asks me which
auction I want. And when I give it a number, it just freezes, crashes, and doesn't give me any errors other than Process terminated with status -1073741510.
Any ideas?

Answer 1

The pointers you pass to scanf() are incorrect.
Change:
scanf("%d", k);
to
scanf("%d", &k);
and change:
scanf("%s", &choice1); //
to
scanf("%s", choice1); //
in two places.