Visual studio in c language using the fopen can't open the file-CodePudding

CodePudding user response:

30 to 256

CodePudding user response:

File name lose similar d: \ mydir \ filename ext so that the full path

CodePudding user response:

Modified as follows, for your reference:

 # include 
#include 
#include 

Void used by copyFile (char infile [], char outfile []) 
{
The FILE * fp1, * fp2; 
Char line [256]. 
If ((fp1=fopen (infile, "r"))==NULL) {
Printf (" Can 't open the file % s! \ n ", infile); 
exit(1); 
} 
If ((fp2=fopen (outfile, "w"))==NULL) {
Printf (" Can 't open the file % s! \ n ", outfile); 
The exit (2); 
} 
While (the fgets (line, 100, fp1)!=NULL) {
Puts (line); 
The fputs (line, fp2); 
} 
The fclose (fp1); 
The fclose (fp2); 
} 


Int main () 
{
//fp1 FILE * and * fp2; 
Outfile char infile [30], [30]. 
//char * p=infile; 
//char * q=outfile; 
//int I; 
Printf (" please enter the need to read the file name: "); 
Gets (infile); 
//for (I=0; p//if (* p=='\ n') * p='\ 0'; 
//} 
Printf (" please input and output file name: "); 
Gets (outfile); 
//for (I=0; Q//if q=='\ n') (* * q='\ 0'; 
//} 
//printf (" need to read the file called: % s ", infile); 
//putchar (' \ n '); 
Used by copyFile (infile outfile); 
//fclose (fp1); 
//fclose (fp2); 

return 0; 
}

CodePudding user response:

The

reference 3 floor QZJHJXJ response:

modify as follows, for reference:

 # include 
#include 
#include 

Void used by copyFile (char infile [], char outfile []) 
{
The FILE * fp1, * fp2; 
Char line [256]. 
If ((fp1=fopen (infile, "r"))==NULL) {
Printf (" Can 't open the file % s! \ n ", infile); 
exit(1); 
} 
If ((fp2=fopen (outfile, "w"))==NULL) {
Printf (" Can 't open the file % s! \ n ", outfile); 
The exit (2); 
} 
While (the fgets (line, 100, fp1)!=NULL) {
Puts (line); 
The fputs (line, fp2); 
} 
The fclose (fp1); 
The fclose (fp2); 
} 


Int main () 
{
//fp1 FILE * and * fp2; 
Outfile char infile [30], [30]. 
//char * p=infile; 
//char * q=outfile; 
//int I; 
Printf (" please enter the need to read the file name: "); 
Gets (infile); 
//for (I=0; p//if (* p=='\ n') * p='\ 0'; 
//} 
Printf (" please input and output file name: "); 
Gets (outfile); 
//for (I=0; Q//if q=='\ n') (* * q='\ 0'; 
//} 
//printf (" need to read the file called: % s ", infile); 
//putchar (' \ n '); 
Used by copyFile (infile outfile); 
//fclose (fp1); 
//fclose (fp2); 

return 0; 
}

 while (the fgets (line, sizeof (line), fp1)!=NULL)

To change ~

CodePudding user response:

The

reference 3 floor QZJHJXJ response:

modify as follows, for reference:

 # include 
#include 
#include 

Void used by copyFile (char infile [], char outfile []) 
{
The FILE * fp1, * fp2; 
Char line [256]. 
If ((fp1=fopen (infile, "r"))==NULL) {
Printf (" Can 't open the file % s! \ n ", infile); 
exit(1); 
} 
If ((fp2=fopen (outfile, "w"))==NULL) {
Printf (" Can 't open the file % s! \ n ", outfile); 
The exit (2); 
} 
While (the fgets (line, 100, fp1)!=NULL) {
Puts (line); 
The fputs (line, fp2); 
} 
The fclose (fp1); 
The fclose (fp2); 
} 


Int main () 
{
//fp1 FILE * and * fp2; 
Outfile char infile [30], [30]. 
//char * p=infile; 
//char * q=outfile; 
//int I; 
Printf (" please enter the need to read the file name: "); 
Gets (infile); 
//for (I=0; p//if (* p=='\ n') * p='\ 0'; 
//} 
Printf (" please input and output file name: "); 
Gets (outfile); 
//for (I=0; Q//if q=='\ n') (* * q='\ 0'; 
//} 
//printf (" need to read the file called: % s ", infile); 
//putchar (' \ n '); 
Used by copyFile (infile outfile); 
//fclose (fp1); 
//fclose (fp2); 

return 0; 
}

Use fputs functions will introduce additional '\ n', because the fgets can have '\ n', while the fputs will add '\ n'

CodePudding user response:

Big probability is the right path, you access the files is not you think the location of the,