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

int main(void) {
        char  buffer[256];
        printf("enter an integer:");
        scanf("%255s",buffer);

        char  valueStr[256];
        sprintf(valueStr,"%d", atoi(buffer));
        if(strcmp(valueStr,buffer)==0)
                printf("'%s' is an integer\n",buffer);
        else
                printf("'%s' isn't an integer\n", buffer);

        return 0;
}