warning: deprecated conversion from string constant to 字符型指

[mz57]

报错内容：warning: deprecated conversion from string constant to ‘char*’
我用的是ubuntu14.04下的g++
程序代码：
char *file1;

FILE *h_file;

strcpy(file1,"Hmatrix");

h_file = open_file_std(file1,"wb");



#include "open.h"
FILE *open_file_std ( char *fname,char *mode )
{
if (strcmp(fname,"-")==0)
{ switch (mode[0])
{ case 'r':
{ return stdin;
}
case 'w':
{ return stdout;
}
default:
{ fprintf(stderr,"Bad mode passed to open_file_std: %s\n",mode);
exit(1);
}
}
}
else
{ return fopen(fname,mode);
}
}