rudimentary

#include <stdio.h>
#include <math.h>
#define SET 1
#define UNSET 0
int main()
{
        int c, brace, bracket, parentheses, d_qot_f, s_qot_f, line_no;
        d_qot_f = s_qot_f = UNSET;
        brace = bracket = parentheses = line_no = 0;

        while((c = getchar()) != EOF) {
                if(c == '\n') {
                        if(brace > 0)
                                printf("you have %d not closed braces in line no %d\n",brace, line_no);
                        else if(brace < 0)
                                printf("you have %d not opened braces in line no %d\n",abs(brace), line_no);
                        if(parentheses > 0)
                                printf("you have %d not closed parentheses in line no %d\n",parentheses, line_no);
                        else if(parentheses < 0)
                                printf("you have %d not opened parentheses in line no %d\n",abs(parentheses), line_no);
                        if(bracket > 0)
                                printf("you have %d not closed brackets in line no %d\n",bracket, line_no);
                        else if(bracket < 0)
                                printf("you have %d not opened brackets in line no %d\n",abs(bracket), line_no);
                        if(s_qot_f == SET)
                                printf("single quotation not closed\n");
                        if(d_qot_f == SET)
                                printf("double quotation not closed\n");
                        line_no++;
                        brace = bracket = parentheses = line_no = 0;
                        d_qot_f = s_qot_f = UNSET;
                }
                else {
                        switch(c) {
                                case '{':++brace;
                                        break;
                                case '(':++parentheses;
                                        break;
                                case '[':++bracket;
                                        break;
                                case '}':--brace;
                                        break;
                                case ')':--parentheses;
                                        break;
                                case ']':--bracket;
                                        break;
                                case '\'':
                                        if(s_qot_f == UNSET)
                                                s_qot_f = SET;
                                        else
                                                s_qot_f = UNSET;
                                        break;
                                case '"':
                                        if(d_qot_f == UNSET)
                                                d_qot_f = SET;
                                        else
                                                d_qot_f = UNSET;
                                        break;
                        }
                }

        if(brace > 0)
                printf("you have %d not closed braces in line no %d\n",brace, line_no);
        else if(brace < 0)
                printf("you have %d not opened braces in line no %d\n",abs(brace), line_no);
        if(parentheses > 0)
                printf("you have %d not closed parentheses in line no %d\n",parentheses, line_no);
        else if(parentheses < 0)
                printf("you have %d not opened parentheses in line no %d\n",abs(parentheses), line_no);
        if(bracket > 0)
                printf("you have %d not closed brackets in line no %d\n",bracket, line_no);
        else if(bracket < 0)
                printf("you have %d not opened brackets in line no %d\n",abs(bracket), line_no);
        if(s_qot_f == SET)
                printf("single quotation not closed\n");
        if(d_qot_f == SET)
                printf("double quotation not closed\n");
        }

        return 0;
}