Question

关于C++中的错误：error C2501: 'base' : missing storage-class or type specifiers

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <iostream.h>
typedef struct Matrix{
int i;
int j;
int e;
struct Matrix *nexti;
struct Matrix *nextj;
}Matrix;
struct Matrix *p;
struct Matrix *q;
struct Matrix *base;
base=(struct Matrix *)malloc(sizeof(Matrix));

出现错误：
C:\Documents and Settings\Administrator\Desktop\实验1%2\实验1%2\魔方阵\魔方阵.cpp(19) : error C2501: 'base' : missing storage-class or type specifiers
C:\Documents and Settings\Administrator\Desktop\实验1%2\实验1%2\魔方阵\魔方阵.cpp(19) : error C2040: 'base' : 'int' differs in levels of indirection from 'struct Matrix *'
C:\Documents and Settings\Administrator\Desktop\实验1%2\实验1%2\魔方阵\魔方阵.cpp(19) : error C2440: 'initializing' : cannot convert from 'struct Matrix *' to 'int'

错误都是指向base=(struct Matrix *)malloc(sizeof(Matrix));这句的

Answer 1

这句话必须放到一个函数里面才能编译通过，比如放到主函数：
int main(void)
{
base = new Matrix;
...
return 0;
}
另外，我用了new，没有用malloc，因为你用的是C++，用new的结果是完全一样的，而且没那么复杂。释放的时候用delete，不要用free

Answer 2

base=(struct Matrix *)malloc(sizeof(Matrix));

把这句放到main()函数中，