subject_26532.htm

vc

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序号：26532 发表者：apple_caro 发表日期：2003-01-02 13:50:31
<br>主题：extern int*? correct??
<br>内容： <BR>I know how to use extern int a, <BR><BR>But how to use a external array , let's say int* a?<BR>e.g. int* a= new int[320*240];<BR>&nbsp;&nbsp;&nbsp;&nbsp; ..............................<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; .............................<BR>&nbsp;&nbsp;&nbsp;&nbsp; extern int* a;<BR><BR>i do like this way, but always get exception in reading the array contents. <BR><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
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<font color=red>答案被接受</font><br>回复者：bb 回复日期：2003-01-02 13:58:12
<br>内容：do as this<BR>for example:<BR>in main.cpp<BR><BR>int *a=NULL;<BR><BR>void main()<BR>{<BR>&nbsp;&nbsp; a=new int[320*240];<BR>&nbsp;&nbsp; .....<BR>}<BR><BR><BR>in other.cpp<BR><BR>extern int *a;<BR><BR>int foo()<BR>{<BR>&nbsp;&nbsp; //use a[i]<BR>&nbsp;&nbsp; int b=a[30];<BR>}<BR><BR><BR>your problem;<BR><BR>int* a= new int[320*240];<BR>This sentence is not in any function, so "new" operator is not be run and int *a also not be iniatlized.<BR>&nbsp;&nbsp;<BR>
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