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ex-05: Improve edge case handling

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This commit is contained in:
Tomáš Kléger 2025-10-20 21:05:54 +02:00
parent 7760c66960
commit 9977715ddc
1 changed files with 12 additions and 6 deletions
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18
exercise-05-calculator/main.c
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@ -8,7 +8,8 @@ int main() {
double num1, num2; double num1, num2;
char op; char op;
if (scanf(" %lf %c %lf = ", &num1, &op, &num2) != 3) { char equal_sign;
if (scanf("%lf %c %lf %c", &num1, &op, &num2, &equal_sign) != 4 || equal_sign != '=') {
printf("Nespravny vstup.\n"); printf("Nespravny vstup.\n");
return EXIT_FAILURE; return EXIT_FAILURE;
} }
@ -35,13 +36,18 @@ int main() {
result = num1 * num2; result = num1 * num2;
break; break;
case '/': case '/':
result = floor(num1 / num2); result = num1 / num2;
if (result < 0) {
result = ceil(num1 / num2);
} else {
result = floor(num1 / num2);
}
break; break;
}; }
if (result > INT_MAX) { if (fabs(result - (int)result) < 1e-9) {
printf("%.1e\n", result);
} else {
printf("%ld\n", (long)result); printf("%ld\n", (long)result);
} else {
printf("%.12g\n", result);
} }
} }