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

int iskeyworl(const char*str){
    
    const char*keyword[]={
        "auto","break","case","char","const","continue","default","do","double","else","enum","extern","float","for","goto","if","int","long","register","return","short","signed","sizeof","static","struct","switch","typedef","union","unsigned","void","volatile","while"
        
    };
    int numkeywords = sizeof(keyword)/sizeof(keywords[0]);
    for(int i =0;i<numkeywords;i++){
        if(strcmp(str,keywords[i]==0){
            return 1;
        }
    }
    return 0;
}
int main(){
    char str[50];
    printf("enter a string:");
    scanf("%s",str);
    if(iskeyword(str)){
        printf("'%s' is a c keyword.\n",str);
    }else{
        printf("'%s'is not a c keywords.\n",str);
    }
    return 0;
}