63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void setup(void) {
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setvbuf(stdin, NULL, _IONBF, 0);
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setvbuf(stdout, NULL, _IONBF, 0);
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setvbuf(stderr, NULL, _IONBF, 0);
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}
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static void banner(void) {
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puts("=== AquaBank Safe Deposit Vault ===");
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puts("Insert your card to issue a receipt or open the vault.");
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}
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static void print_receipt(void) {
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char buf[64];
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puts("Type the receipt header (up to 64 chars):");
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ssize_t n = read(STDIN_FILENO, buf, sizeof(buf));
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if (n <= 0) return;
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puts("--- RECEIPT ---");
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fwrite(buf, 1, 256, stdout);
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puts("");
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puts("---------------");
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}
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static void open_vault(void) {
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char combo[128];
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puts("Enter your combination:");
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(void)read(STDIN_FILENO, combo, 512);
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printf("Combination registered: %.32s ...\n", combo);
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}
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static void menu(void) {
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char line[16];
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while (1) {
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puts("");
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puts("=== AquaBank Vault ===");
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puts("1) Print receipt");
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puts("2) Open vault");
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puts("3) Exit");
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printf("> "); fflush(stdout);
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if (!fgets(line, sizeof(line), stdin)) break;
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switch (atoi(line)) {
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case 1: print_receipt(); break;
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case 2: open_vault(); return;
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case 3: puts("Bye"); return;
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default: puts("?");
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}
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}
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}
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int main(void) {
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setup();
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banner();
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menu();
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return 0;
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}
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