54 lines
1020 B
C
54 lines
1020 B
C
#include <limits.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main() {
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printf("Zadejte vzorec:\n");
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double num1, num2;
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char op;
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char equal_sign;
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if (scanf("%lf %c %lf %c", &num1, &op, &num2, &equal_sign) != 4 || equal_sign != '=') {
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printf("Nespravny vstup.\n");
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return EXIT_FAILURE;
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}
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if (op != '+' && op != '-' && op != '*' && op != '/') {
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printf("Nespravny vstup.\n");
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return EXIT_FAILURE;
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}
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if (op == '/' && num2 == 0) {
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printf("Nespravny vstup.\n");
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return EXIT_FAILURE;
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}
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double result = 0;
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switch (op) {
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case '+':
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result = num1 + num2;
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break;
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case '-':
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result = num1 - num2;
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break;
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case '*':
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result = num1 * num2;
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break;
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case '/':
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result = num1 / num2;
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if (result < 0) {
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result = ceil(num1 / num2);
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} else {
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result = floor(num1 / num2);
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}
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break;
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}
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if (fabs(result - (int)result) < 1e-9) {
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printf("%ld\n", (long)result);
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} else {
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printf("%.12g\n", result);
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}
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}
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