155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
#include <stdlib.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#define SIZE 128
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//kontrola, ze ci vycitane informacie su aritmeticky spravne
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//VRACIA: int: -1 (CHYBA), 0 (False), (True)
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float IsArithCorrect(float num1, float num2, char* op, float result)
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{
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switch (*op)
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{
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case '-':
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if ((num1-num2) == result) { return 1;}
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break;
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case '+':
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if ((num1+num2) == result) { return 1;}
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break;
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case '*':
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if ((num1*num2) == result) { return 1;}
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break;
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case '/':
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if (num2 == 0) { return -1;}
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if ((num1/num2) == result ) { return 1;}
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break;
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}
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return 0;
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}
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int main()
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{
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//pomocne premeny
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char line[SIZE], strBuffer[SIZE];
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line[0] = '\0';
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strBuffer[0] = '\0';
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char* strtofEndPtr;
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while (fgets(line, SIZE, stdin) != NULL)
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{
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if (sscanf(line, "%127[^\n]", strBuffer) == 1)
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{
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bool isLineInvalid = false;
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//docasne 'char' premeny
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char num1Temp[10], num2Temp[10], resultTemp[10];
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num1Temp[0] = '\0';
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num2Temp[0] = '\0';
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resultTemp[0] = '\0';
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int writeIntoArrayNum = 1;
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bool foundOp = false;
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bool foundEqualSign = false;
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char op1 = 'N'; //N = 'None/NIC'
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for (int i = 0; strBuffer[i] != '\0'; i++)
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{
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if (isspace() != 0)
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{
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continue;
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}
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if (isdigit(strBuffer[i]) != 0 || strBuffer[i] == '.')
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{
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if (op1 == 'N')
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{
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strncat(num1Temp, &strBuffer[i], 1);
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}
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else if (!foundEqualSign)
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{
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strncat(num1Temp, &strBuffer[i], 1);
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}
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else
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{
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strncat(resultTemp, &strBuffer[i], 1);
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}
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}
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//ak je to nejaky printable symbol ('*/-,:./), skontroluj ci to nie je artimeticke znamienko alebo desatinna bodka (a udel im vynimku)
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//AK NIE, povazuj za riadok neplatny...
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if (strBuffer[i] == '=')
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{
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foundEqualSign = true;
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continue;
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}
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if (strBuffer[i] == '+' || strBuffer[i] == '-' || strBuffer[i] == '/' || strBuffer[i] == '*')
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{
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//predbezna kontrola, ze ci sme doteraz daco vobec nacitavali
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if (op1 == 'N' || strBuffer[0] == '\0')
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{
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isLineInvalid = true;
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}
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op1 = strBuffer[i];
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}
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else if (strBuffer[i] == '.')
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{
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//zisti, kde treba zapisat desatinnu bodku
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switch (writeIntoArrayNum)
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{
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case 1:
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strncat(num1Temp, &strBuffer[i], 1);
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break;
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case 2:
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strncat(num2Temp, &strBuffer[i], 1);
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break;
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case 3:
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strncat(resultTemp, &strBuffer[i], 1);
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break;
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}
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}
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else
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{
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isLineInvalid = true;
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break;
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}
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if (isalpha(strBuffer[i]) != 0)
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{
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isLineInvalid = true;
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break;
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}
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}
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float num1 = strtof(num1Temp, &strtofEndPtr);
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float num2 = strtof(num2Temp, &strtofEndPtr);
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float resultNum = strtof(resultTemp, &strtofEndPtr);
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//** konecna faza = vypisovanie vysledkov
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//ak systematicka chyba
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if (isLineInvalid || op1 == 'N' || IsArithCorrect(num1, num2, &op1, resultNum) == -1)
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{
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printf("CHYBA\n");
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}
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else if (IsArithCorrect(num1, num2, &op1, resultNum) == 0)
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{
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printf("ZLE\n");
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}
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else
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{
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printf("OK\n");
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}
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}
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}
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return 0;
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}
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