嗨，我需要让用户输入 3 个值，直到他输入 EOF(Ctrl+z)。EOF 部分不起作用，用户每次输入 6 个值，我需要 3 个

Question

#define SIZE 7
#include<stdio.h>
int main()
{
int NoOfDoors[SIZE];
int CarManufYear[SIZE];
float CarCost[SIZE];
for(int i=0; i<SIZE; i++)
{
printf("\nEnter 3 values (Door, year, price):");
scanf("%d%d%f", &NoOfDoors[i], &CarManufYear[i], &CarCost[i]);
if(scanf("%d%d%f", &NoOfDoors[i], &CarManufYear[i], &CarCost[i])==EOF)
{
break;
}
}
printf("End of the code");
return 0;
}

// the code is reading 6 values (instead of 3) then print the message again to read. Also, the EOF part is not working properly.

Answer 1

Call scanf() once per iteration and save the return value. Then test the return value.

for (int i=0; i<SIZE; i++) {
  printf("\nEnter 3 values (Door, year, price): ");
  int retval = scanf("%d%d%f", &NoOfDoors[i], &CarManufYear[i], &CarCost[i]);
  if(retval == EOF) {
    break;
  }
  if(retval != 3) {
    Handle_incorrect_input(); // TBD code
    break;
  }
  printf("Door:%d Year:%d Price:%.2f", NoOfDoors[i], CarManufYear[i], CarCost[i]);

}