Added exercise 26 (sort cars)
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct car {
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char maker[21];
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char model[21];
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unsigned int power;
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unsigned int price;
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};
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enum sort {
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MODEL,
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MAKER,
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PRICE,
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POWER
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};
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enum sort sorting = MAKER;
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int asc = 0;
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int asc_desc(int o) {
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if (asc) {
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return o;
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} else {
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return o * -1;
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}
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}
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int compare_cars(const void* car1, const void* car2) {
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const struct car* c1 = car1;
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const struct car* c2 = car2;
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// printf("%s %s %u %u\n", c1->maker, c1->model, c1->power, c1->price);
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// printf("%s %s %u %u\n", c2->maker, c2->model, c2->power, c2->price);
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switch (sorting) {
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case MODEL:
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return asc_desc(strcmp(c1->model, c2->model));
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case MAKER:
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return asc_desc(strcmp(c1->maker, c2->maker));
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case PRICE:
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return asc_desc(c1->price - c2->price);
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case POWER:
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return asc_desc(c1->power - c2->power);
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}
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}
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int main(int argc, const char** argv) {
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if (argc == 2) {
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if (!strcmp(argv[1], "+model")) { sorting = MODEL; asc = 1; }
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else if (!strcmp(argv[1], "-model")) { sorting = MODEL; asc = 0; }
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else if (!strcmp(argv[1], "+maker")) { sorting = MAKER; asc = 1; }
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else if (!strcmp(argv[1], "-maker")) { sorting = MAKER; asc = 0; }
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else if (!strcmp(argv[1], "+price")) { sorting = PRICE; asc = 1; }
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else if (!strcmp(argv[1], "-price")) { sorting = PRICE; asc = 0; }
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else if (!strcmp(argv[1], "+power")) { sorting = POWER; asc = 1; }
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else if (!strcmp(argv[1], "-power")) { sorting = POWER; asc = 0; }
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else { fprintf(stderr, "wrong argument\n"); return 3; }
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} else if (argc > 2) {
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fprintf(stderr, "wrong arguments\n");
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return 3;
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}
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size_t length = 1024, i = 0;
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struct car* A = malloc(sizeof(struct car) * length);
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if (!A) {
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perror("Cannot allocate cars");
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return 1;
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}
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while(!feof(stdin)) {
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scanf("%s %s %u %u\n", A[i].maker, A[i].model, &A[i].power, &A[i].price);
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i++;
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if (i == length) {
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length *= 2;
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struct car* B = realloc(A, sizeof(struct car) * length);
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if (!B) {
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perror("Cannot expand cars");
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free(A);
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return 2;
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}
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A = B;
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}
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}
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qsort(A, i, sizeof(struct car), compare_cars);
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for (size_t j = 0; j < i; j++) {
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printf("%s %s %u %u\n", A[j].maker, A[j].model, A[j].power, A[j].price);
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}
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free(A);
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}
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@ -0,0 +1,126 @@
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#!/bin/sh
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#
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# test 1
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#
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cat > test1.in <<EOF
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fiat bravo 105 30000
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bmw 305i 120 50000
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bmw 305 100 45000
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fiat 500 80 25000
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EOF
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./sort_cars < test1.in > test1.out
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cat > test1.expected <<EOF
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fiat bravo 105 30000
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fiat 500 80 25000
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bmw 305i 120 50000
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bmw 305 100 45000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 1 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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#
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# test 2
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#
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./sort_cars +model < test1.in > test1.out
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cat > test1.expected <<EOF
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bmw 305 100 45000
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bmw 305i 120 50000
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fiat 500 80 25000
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fiat bravo 105 30000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 2 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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#
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# test 3
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#
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./sort_cars -power < test1.in > test1.out
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cat > test1.expected <<EOF
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bmw 305i 120 50000
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fiat bravo 105 30000
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bmw 305 100 45000
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fiat 500 80 25000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 3 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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#
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# test 4
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#
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./sort_cars +power < test1.in > test1.out
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cat > test1.expected <<EOF
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fiat 500 80 25000
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bmw 305 100 45000
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fiat bravo 105 30000
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bmw 305i 120 50000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 4 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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#
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# test 5
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#
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./sort_cars +price < test1.in > test1.out
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cat > test1.expected <<EOF
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fiat 500 80 25000
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fiat bravo 105 30000
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bmw 305 100 45000
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bmw 305i 120 50000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 5 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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#
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# test 6
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#
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./sort_cars -price < test1.in > test1.out
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cat > test1.expected <<EOF
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bmw 305i 120 50000
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bmw 305 100 45000
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fiat bravo 105 30000
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fiat 500 80 25000
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EOF
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 6 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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rm -f test1.in
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#
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# test 7
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#
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(for x in `seq 1 200`; do for y in `seq 100 300`; do echo "maker$x model$y 1$x ${x}9$y"; done; done ) > test1.in
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./sort_cars +price < test1.in > test1.out
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sort -n -k 4 < test1.in > test1.expected
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if diff -q test1.out test1.expected; then
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rm -f test1.out test1.expected
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else
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echo "Test 7 FAILED"
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diff test1.out test1.expected
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exit 1
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fi
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rm -f test1.in
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echo PASSED
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