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 /* tao hinh chu nhat n hang, m cot 
*  *  *  *   *
*            *
*            *
*            *
*  *  *  *   *
 thuat toan :b1 dau vao:do dai hai canh m,n
             b2:tinh toan
             tao hai vong lap i=1 toi n va j=1 toi m
             vong lap thu 2, j>1va j<m-1; in ra khoang trang
                            con lai in ra * 
             b3.ket qua la hinh tren
         */
#include<stdio.h>

int nhap(int &n,int &m)  //ham nhap 
{     
 	printf("nhap do dai hai canh n,m:");
 	scanf("%d%d",&n,&m);
}
int main()
{
int a, b;
nhap(a,b);
for(int i=1;i<a;i++){
	for(int j=1;j<b;j++)
	{
		if(j>=2 &&j<m)
		{
			printf("  2 ");
		}
		else printf(" * ");
	}printf("\n");
}
return 0;
}             
             

prog.c:16:14: error: expected ')'
int nhap(int &n,int &m)  //ham nhap 
             ^
prog.c:16:9: note: to match this '('
int nhap(int &n,int &m)  //ham nhap 
        ^
prog.c:16:14: error: parameter name omitted
int nhap(int &n,int &m)  //ham nhap 
             ^
prog.c:19:17: error: use of undeclared identifier 'n'
        scanf("%d%d",&n,&m);
                      ^
prog.c:19:20: error: use of undeclared identifier 'm'
        scanf("%d%d",&n,&m);
                         ^
prog.c:24:8: error: too many arguments to function call, expected 1, have 2
nhap(a,b);
~~~~   ^
prog.c:16:1: note: 'nhap' declared here
int nhap(int &n,int &m)  //ham nhap 
^
prog.c:28:15: error: use of undeclared identifier 'm'
                if(j>=2 &&j<m)
                            ^
6 errors generated.

Standard output is empty