检查括号是否匹配

#include <stdio.h>
#include <stdlib.h>
#include "../Stack/stack.h"

const char closMiss[] = "Close paren missing at line";
const char openMiss[] = "Open paren missing at line";

int main()
{
    STACK* stack;
    char token;
    char* dataPtr;
    char fileID[25];
    FILE* fpIn;
    int lineCount = 1;

    stack = createStack();
    printf("Enter file ID for file to be parsed:");
    scanf("%s", fileID);

    fpIn = fopen(fileID, "r");
    if(!fpIn){
        printf("Error opening %s\n", fileID);
        exit(100);
    }
    while ((token = fgetc(fpIn)) != EOF){
        if(token == '\n')
            lineCount++;
        if(token == '('){
            dataPtr = (char*)malloc(sizeof(char));
            pushStack(stack, dataPtr);
        }
        else{
            if(token == ')'){
                if(emptyStack(stack)){
                    printf("%s %d\n", openMiss, lineCount);
                    return 1;
                }
                else{
                    dataPtr = (char*) popStack(stack);
                    free(dataPtr);
                }
            }
        }
    }
    if(!emptyStack(stack)){
        printf("%s %d\n", closMiss, lineCount);
        return 1;
    }
    destroyStack(stack);

    printf("Parsing is OK: %d Line parsed.\n", lineCount);

    return 0;
}