Question

error C2440: '=' : cannot convert from

#include <iostream.h>
const int M=25, N=81;
#include <windows.h>
void SetColor(unsigned short ForeColor=7,unsigned short BackGroundColor=0)
{
HANDLE hCon=GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleTextAttribute(hCon,ForeColor+BackGroundColor*0x10);
}
void main()
{
char a[M][N];
for(int i=0;i<M;i++)
for(int j=0;j<N;j++)
a[i][j]=1;
char *p;
for(i=0;i<M;i++)
p[i]=a[i];

unsigned short x;
for(x=0, i=0; x<=15;x++,i++)
{
SetColor(12,x);
cout<<p[i]<<flush;
}
}

错误提示如下：
--------------------Configuration: z - Win32 Debug--------------------
Compiling...
zz.cpp
C:\Program Files\Microsoft Visual Studio\MyProjects\z\zz.cpp(18) : error C2440: '=' : cannot convert from 'char [81]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
Error executing cl.exe.

zz.obj - 1 error(s), 0 warning(s)

谢谢！！！

Answer 1

char *p只有一个声明，没有分配内存
应该加上 = new char[M*N];
用完之后在释放内存
用delete [M*N]p;

Answer 2

p是字符指针，*p是字符，不能指向字符串

Answer 3

char a[M][N]和p[i]维数不同

Answer 4

p[i]=a[i];
p[i]是char型的，a[i]是char*的，不能直接赋值。

Answer 5

类型不一样