How to add in the file group c before the original data does not cover add data?-CodePudding

It took me a + files, but after the operation or only showed now add data

CodePudding user response:

Using C + + fstream, you this is a C API

CodePudding user response:

reference 1st floor Italink response:

using the C + + fstream, you this is C API

Do not understand, can say in detail

CodePudding user response:

 FILE * fp1; 
Fp1=fopen (" C:/Users/yf/Documents/Visual Studio 2010/Projects/ReadTime/ReadTime/ReadTime XLS ", "a +");//fp pointer to file header 
Fseek (fp1, 0, SEEK_END); 
If (fp1==NULL) 
{
Printf (" open failure \ n "); 
System (" PAUSE "); 
} 
System (" PAUSE "); 

Int aa=1000; 
Char STR [20]. 
Char * str11="\ t \ n"; 
The fputs (str11 fp1); 
Char * str1="\ n \ t"; 
The fputs (str1 fp1); 
Itoa (aa, STR, 10); 
The fputs (STR, fp1); 
Printf (" open success \ n "); 

The fclose (fp1);

Before the test continue to write data code, it's helpful for you to see if it

CodePudding user response:

The

reference 3 floor of dye dust response:

 FILE * fp1; 
Fp1=fopen (" C:/Users/yf/Documents/Visual Studio 2010/Projects/ReadTime/ReadTime/ReadTime XLS ", "a +");//fp pointer to file header 
Fseek (fp1, 0, SEEK_END); 
If (fp1==NULL) 
{
Printf (" open failure \ n "); 
System (" PAUSE "); 
} 
System (" PAUSE "); 

Int aa=1000; 
Char STR [20]. 
Char * str11="\ t \ n"; 
The fputs (str11 fp1); 
Char * str1="\ n \ t"; 
The fputs (str1 fp1); 
Itoa (aa, STR, 10); 
The fputs (STR, fp1); 
Printf (" open success \ n "); 

The fclose (fp1);

Before testing continues to write data code, it's helpful for you to see if it

I have to solve. Thanks