lexuanquynh

#include <stdio.h>  
#include <conio.h>  

void main() {  
  printf("Hello C Language");  
  
  getch();  
}

lexuanquynh

printf("format string",argument_list);  

lexuanquynh

scanf("format string",argument_list);  

lexuanquynh

#include<stdio.h>  
#include<conio.h> 

void main() {  
int number;  
//clrscr();  //Ham nay chi dung cho Tubor C hoac Borland C. Dev-C khong dung duoc
  
printf("Nhap canh cua khoi lap phuong:");  
scanf("%d",&number);  
  

lexuanquynh

#include<stdio.h>  
#include<conio.h>  

void main(){  
  int x=0,y=0,result=0;  
  //clrscr();  //Ham nay chi dung cho BC hoac TC, khong dung cho dev-C
  
  printf("Nhap so thu nhat:");  
  scanf("%d", &x);  
  

lexuanquynh

#include <stdio.h>  

void main(){  
  printf("Hello C Language");  
}  

lexuanquynh

int a;  
float b;  
char c;  

lexuanquynh

int a=10,b=20;//khai bao va khoi tao 2 bien nguyen
float f=20.8;  //kieu thuc
char c='A';  //kieu ky 

lexuanquynh

int a;  
int _ab;  
int a30;  

lexuanquynh

int 2;  
int a b;  
int long;