pvjc24/a1/program.c

#include <stdio.h>
#include <stdlib.h>

#define SIZE 1000

typedef struct{
    char* p_na_line;
    struct link* p_na_next_struct;
}link;

int main()
{
    link* pointer_to_start_of_chain = malloc(sizeof(link));
    memset(pointer_to_start_of_chain,0,sizeof(link));
    reading_strings_and_storing_them_in_memory(pointer_to_start_of_chain);
    int result=0;
    link* next_link = pointer_to_start_of_chain;
    while(next_link != NULL){
        result=analizing_string(next_link->p_na_line);
        if(result==0){
            printf("ZLE\n");
        }else if(result==1){
            printf("OK\n");
        }else{
            printf("CHYBA\n");
        }
        next_link=next_link->p_na_next_struct;
    }
    return 0;
}

void reading_strings_and_storing_them_in_memory(link* pointer_to_start_of_chain){
    link* next_link = pointer_to_start_of_chain;
    char buffer[SIZE];
    link* ancestor=NULL;
    while(1){
        if(fgets(buffer, SIZE, stdin)==NULL||buffer[0]=='\n'){
            if(ancestor!=NULL){
                free(ancestor->p_na_next_struct);
                ancestor->p_na_next_struct=NULL;
            }
            break;
        }

        int size=strlen(buffer)+1;

        next_link->p_na_line=malloc(size);
        next_link->p_na_next_struct=malloc(sizeof(link));

        memcpy(next_link->p_na_line, buffer,size);
        ancestor=next_link;
        next_link=next_link->p_na_next_struct;
    }
}
int analizing_string(char* pointer){
    float number1, number2, result3;


    int counter=0;
    char operant;
    int i=0;

    while(pointer[i]!='\0'){
        if(pointer[i]=='+'||pointer[i]=='/'||pointer[i]=='*'||pointer[i]=='-'){
            operant=pointer[i];
            counter++;
            if(counter>1){
                return -1;
            }
        }
        i++;
    }

    char delim[] =" +=-*/\n";

    char *first_number_cucumber=strtok(pointer, delim);

    if(first_number_cucumber==NULL||is_number_question_mark(first_number_cucumber)==0){

        return -1;
    }

    char *second_number=strtok(NULL, delim);

    if(second_number==NULL||is_number_question_mark(second_number)==0){
        return -1;
    }


    char *result=strtok(NULL, delim);
    if(result==NULL||is_number_question_mark(result)==0){
        return -1;
    }

    char *token = strtok(NULL, delim);
    if(token!=NULL){
        return -1;
    }


    number1=atof(first_number_cucumber);
    number2=atof(second_number);
    result3=atof(result);

    if(operant=='+' &&result3==number1+number2){
        return 1;
    }
    if(operant=='-'&&(result3==number1-number2)){
        return 1;
    }
    if(operant=='*'&&(result3==number1*number2)){
        return 1;
    }
    if(operant=='/'&&(result3==number1/number2)){
        return 1;
    }
    return 0;
}


int is_number_question_mark(char *pointer){
    for(int i=0; pointer[i]!='\0'; i++){
       if (!isdigit(pointer[i])&&pointer[i]!='.'&&pointer[i]!=',') {
            return 0;
        }
    }
    return 1;
}