103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <math.h>
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char* check_math_problem(const char* problem) {
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char* result_str = (char*)malloc(10 * sizeof(char));
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if (result_str == NULL) {
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fprintf(stderr, "Error with memory\n");
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exit(EXIT_FAILURE);
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}
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//char* copy = strcmp(problem);
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char* copy = (char*)malloc((strlen(problem) + 1) * sizeof(char));
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strcpy(copy, problem);
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if (copy == NULL) {
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fprintf(stderr, "Error with memory\n");
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exit(EXIT_FAILURE);
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}
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char* src = copy;
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char* dst = copy;
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while (*src != '\0') {
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if (*src != ' ') {
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*dst++ = *src;
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}
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src++;
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}
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*dst = '\0';
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if (strlen(copy) == 0) {
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free(copy);
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return "CHYBA";
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}
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double n1, n2, res;
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char sing, equel;
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if(sscanf(copy, "%lf%c%lf%c%lf", &n1, &sing, &n2, &equel, &res) !=5)
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{
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free(copy);
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return "CHYBA";
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}
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// printf("%lf%c%lf%c%lf", n1, sing, n2, equel, res);
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//return "1234";
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double result;
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switch (sing) {
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case '+':
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result = n1 + n2;
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break;
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case '-':
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result = n1 - n2;
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break;
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case '*':
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result = n1 * n2;
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break;
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case '/':
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if (fabs(n2) < 1e-9) {
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free(copy);
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return "ZLE";
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}
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result = n1 / n2;
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break;
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default:
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free(copy);
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return "CHYBA";
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}
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if (fabs(result - res) < 0.01) {
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strcpy(result_str, "OK");
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} else {
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strcpy(result_str, "ZLE");
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}
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free(copy);
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return result_str;
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}
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int main() {
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char problem[100];
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while (true) {
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fgets(problem, sizeof(problem), stdin);
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if (strlen(problem) == 1) {
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break;
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}
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printf("%s\n", check_math_problem(problem));
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}
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return 0;
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}
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