| 1 | #if 1
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| 2 | #include <fstream.hfa>
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| 3 | #include <coroutine.hfa>
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| 4 |
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| 5 | coroutine Fmt {
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| 6 | char ch; // communication variables
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| 7 | int g, b; // needed in destructor
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| 8 | };
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| 9 | void main( Fmt & fmt ) with( fmt ) {
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| 10 | for () { // for as many characters
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| 11 | for ( g = 0; g < 5; g += 1 ) { // groups of 5 blocks
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| 12 | for ( b = 0; b < 4; b += 1 ) { // blocks of 4 characters
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| 13 | // do {
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| 14 | suspend();
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| 15 | // } while ( ch == '\n' || ch == '\t' );
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| 16 | sout | ch; // print character
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| 17 | }
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| 18 | sout | " "; // block separator
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| 19 | }
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| 20 | sout | nl; // group separator
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| 21 | }
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| 22 | }
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| 23 | void ?{}( Fmt & fmt ) { resume( fmt ); } // prime (start) coroutine
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| 24 | void ^?{}( Fmt & fmt ) with( fmt ) { // destructor
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| 25 | if ( g != 0 || b != 0 ) // special case
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| 26 | sout | nl; }
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| 27 | void send( Fmt & fmt, char c ) { fmt.ch = c; resume( fmt ); }
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| 28 | int main() {
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| 29 | Fmt fmt;
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| 30 | sout | nlOff; // turn off auto newline
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| 31 | for ( 41 )
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| 32 | send( fmt, 'a' );
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| 33 | // sout | nlOff; // turn off auto newline
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| 34 | // eof: for () { // read until end of file
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| 35 | // sin | fmt.ch; // read one character
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| 36 | // if ( eof( sin ) ) break eof; // eof ?
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| 37 | // format( fmt ); // push character for formatting
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| 38 | // }
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| 39 | }
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| 40 | #else
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| 41 |
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| 42 | #include <stdio.h>
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| 43 |
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| 44 | struct Format {
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| 45 | char ch; // used for communication
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| 46 | int g, b; // global because used in destructor
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| 47 | };
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| 48 |
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| 49 | void format( struct Format * fmt ) {
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| 50 | if ( fmt->ch != -1 ) { // not EOF ?
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| 51 | // if ( fmt->ch == '\n' || fmt->ch == '\t' ) return;
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| 52 | // printf( "%c %d %d", fmt->ch, fmt->g, fmt->b ); // character
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| 53 | printf( "%c", fmt->ch ); // character
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| 54 | fmt->b += 1;
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| 55 | if ( fmt->b == 4 ) { // block ?
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| 56 | printf( " " ); // separator
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| 57 | fmt->b = 0;
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| 58 | fmt->g += 1;
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| 59 | }
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| 60 | if ( fmt->g == 5 ) { // group ?
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| 61 | printf( "\n" ); // separator
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| 62 | fmt->g = 0;
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| 63 | }
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| 64 | } else {
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| 65 | if ( fmt->g != 0 || fmt->b != 0 ) printf( "\n" );
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| 66 | }
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| 67 | }
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| 68 | int main() {
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| 69 | struct Format fmt = { 0, 0, 0 };
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| 70 | for ( ;; ) {
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| 71 | scanf( "%c", &fmt.ch );
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| 72 | if ( feof( stdin ) ) break;
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| 73 | format( &fmt );
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| 74 | }
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| 75 | fmt.ch = -1;
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| 76 | format( &fmt );
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| 77 | }
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| 78 | #endif
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| 79 |
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| 80 | // Local Variables: //
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| 81 | // tab-width: 4 //
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| 82 | // fill-column: 120 //
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| 83 | // compile-command: "cfa Format.cfa" //
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| 84 | // End: //
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