check-input_TuanVM

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

//luu y chi dung 1 ham check
//Ham check 1
int check(){
    int check=0;
    char s[11];//do kieu int bang hon 2 ty nen toi da la 10 ki tu so nhap vao
    int i=0;
    char c;
    do{

        while((c=getchar())!='\n'){//nhap tung ki tu tu ban phim
            if(isdigit(c)){
                s[i++]=c;//do tung ki tu vao xau
                check=1;//danh dau la dang nhap so
            }else{
                i=0;//gan lai
                check=0;//ki tu nhap vao sai , nhap lai
                break;
            }
        }
        if(check==0){
            printf("Enter again.\n");
            fflush(stdin);
        }

    }while(check==0);
    int n=atoi(s);//chuyen xau sang so
    return n;

}

//ham check 2
int inputCheck(int min, int max,char msg[],char err []){
    int num;
    int check;
    char c;
    do{
        printf("%s",msg);
        check=scanf("%d%c", &num, &c);//Returns the value of an integer
        fflush(stdin);
        if(check!=2||c != '\n' || num<min || num>max){
            printf(err);
            fflush(stdin);//Delete buffer
            check=0; //input is a character
        }
        else{
            check=1; //input is a number
        }
    }while(check==0);
    return num;
}

int main(){

    int n=check();
    printf("%d",n);


    return 0;
}