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c:stdio.h:fsetpos

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c:stdio.h:fsetpos [2013/01/22 22:02] (current)
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 +{{keywords>wiki library source code example reference}}
 +====== fsetpos ======
 +
 +<code c>
 +    int fsetpos(FILE *stream, const fpos_t *pos); 
 +</code>
 +reset the position indicator to  using fsetpos()
 +stores the current file position indicator to the location indicated by the information in pos
 +Returns non-zero on error.
 +===== C Sourcecode Example =====
 +<code c>
 +#include <stdio.h> /* including standard library */
 +//#include <windows.h> /* uncomment this for Windows */
 +
 +
 +int main( void )
 +{
 +    FILE *stream;
 +    fpos_t file_pos;
 +    int c;
 +    int i;
 +
 +    if((stream=fopen("test.txt","r"))==NULL) {
 +        printf("Cannot open file.\n");
 +        return 1;
 +    }
 +      
 +   fgetpos(stream, &file_pos); 
 +  
 +   while((c = fgetc(stream) ) != EOF) {
 +     if ( c == '#' ) { 
 +             fgetpos(stream, &file_pos); 
 +           }
 +        printf("%c", c);
 +     }
 +     
 +   printf("1st Position of # is the %d Byte\n", file_pos);
 +
 +   printf("\nset to given position\nand print it again\n");
 +   fsetpos(stream, &file_pos);
 +
 +   while((c = fgetc(stream) ) != EOF) {
 +        printf("%c", c);
 +     }
 +
 +      fclose(stream);
 +}
 +
 +</code>
 +
 +==== output ====
 +    output:  ./fsetpos 
 +    test 1234,
 +     ... # ...
 +    this is a test for code-reference.com 
 +    1st Position of # is the 17 Byte
 +    
 +    set to given position
 +    and print it again
 +     ...
 +    this is a test for code-reference.com
  
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c/stdio.h/fsetpos.txt · Last modified: 2013/01/22 22:02 (external edit)

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