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1. È·ÈÏÊÇ fopen¾Í´íÁË£¬»¹ÊÇÖ®ºó£¬±ÈÈçopenÒ»¸ö²»´æÔÚµÄÎļþ£¬È»ºófread¾Í»á´í
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linux c ÏÂÊÇÄܹ»Ê¹ÓÃfopen ºÍfclose Á½¸öº¯Êý´ò¿ªÎļþ, ³öÏÖ´íÎó, ²éһϲÎÊýÓÐûÓжÔ.

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ANSI C µÄ¿âº¯Êý¶¼Äܹ»ÔÚ LinuxÏÂʹÓÃ.



#include <stdio.h>

FILE *fopen(const char *path, const char *mode);

The argument mode points to a string beginning with one of the following sequences (Additional  characters  may follow these sequences.):

      r      Open text file for reading.  The stream is positioned at the beginning of the file.

      r+    Open for reading and writing.  The stream is positioned at the beginning of the file.

      w      Truncate file to zero length or create text file for writing.  The stream is positioned at the beginning of the file.

      w+    Open for reading and writing.  The file is cr


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main()
{
int a,b,sum;
a=1;b=2;
sum=a+b;
printf("sum is %d\n");
}


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