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#include <stdio.h>
struct accountNum {
int sequence;
char sAccountNum[16];
};
typedef struct accountNum ACCOUNTNUM;
int LastAccountNumber(ACCOUNTNUM* info) {
int success = 0;
FILE* file = fopen("acctNumbers.dat", "rb");
if (file == NULL) {
return -1; // Allows you to document different types of errors
}
while ((fread(info, sizeof(struct accountNum), 1, file)) == 1) {
success = 1;
}
fclose(file);
return success;
}
int main() {
ACCOUNTNUM N[] = {{123, "2022-1"}, {111, "2022-2"}, {321, "2022-3"}};
FILE* file = fopen("acctNumbers.dat", "wb");
fwrite(N, 1, sizeof N, file);
fclose(file);
ACCOUNTNUM info;
if (LastAccountNumber(&info) == 1) // if -1 couldn't open file, if 0 no record read
printf("\nAcc No %s", info.sAccountNum);
}
{ 2022-1 o 2022-2 A 2022-3
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