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

int isKeyword(char buffer[]){
    char keywords[32][10] = {"auto","break","case","char","const","continue","default",
                            "do","double","Else","enum","Function","Float","for","goto",
                            "If","Integer","long","register","Return","short","signed",
                            "sizeof","static","struct","switch","typedef","union",
                            "DOWhile","void","Write","while"};
    int i, flag = 0;

    for(i = 0; i < 32; ++i){
        if(strcmp(keywords[i], buffer) == 0){
            flag = 1;
            break;
        }
    }
//new
     int k, flag2 = 0;

    for (k = 0; k<32; ++k){
        if(strcmp(keywords[k], buffer) == 0){
	    flag2 = 1;
            break;
        }
    }

    return flag;

//new
    return flag2;
}

int main(){
    char ch, buffer2[15], operators[] = "+-*/%=";
//eh
    char ch2, buffer[15], seperators[] = "{}(),;";
    FILE *fp;
//k is new
    int i,k,j=0;

    fp = fopen("APU_CS370_input.txt","r");

    if(fp == NULL){
        printf("error while opening the file\n");
        exit(0);
    }

    while((ch = fgetc(fp)) != EOF){
           for(i = 0; i < 6; ++i){
               if(ch == operators[i])
                   printf("%c is operator\n", ch);

// new
    while((ch2 = fgetc(fp)) != EOF){
	  for(k = 0; k < 6; ++k){
	       if(ch2 == seperators[k])
		   printf("%c is seperator\n", ch2);
		}
           }
    }
           if(isalnum(ch)){
               buffer[j++] = ch;

//new
	   if(isalnum(ch2)){
	       buffer[j++] = ch2;
           }
	}
           else if((ch == ' ' || ch == '\n') && (j != 0)){
                   buffer[j] = '\0';
                   j = 0;

                   if(isKeyword(buffer) == 1)
                       printf("%s is keyword\n", buffer);
                   else
                       printf("%s is indentifier\n", buffer);
           }

    }

    fclose(fp);

    return 0;
}