テキストコンテンツから有効な情報を抽出
6250 ワード
a.txt $ABC,eqwe,0123,N,we23,E,234 $ABD,fkjd,2454,N,fwer,E,456 $AB,fhew,9478,N,wewf,E,rnju $ABC,wefn,9834,N,riwqj,E,42 要件:
抽出された有効な情報は
eqwe,0123,we23
wefn,9834,riwqj
コード実装:
#include #include #include #include #include int i=0; // int main(){ int fd=open( "a.txt" ,O_RDONLY,0644); char c; // ssize_t bytes; char xinxi[256]; // if (fd==-1) { perror ( "open" ); return -1; } // while (bytes=(read(fd,&c, sizeof (c)))>0) { if (c== '$' ) { // read(fd,&c, sizeof (c)); if (c== 'A' ) { read(fd,&c, sizeof (c)); if (c== 'B' ) { read(fd,&c, sizeof (c)); if (c== 'C' ) { read(fd,&c, sizeof (c)); // read(fd,&c, sizeof (c)); // if (c!= ',' ){ while (c!= 'N' ) // { {xinxi[i]=c; // ++i; read(fd,&c, sizeof (c));} } read(fd,&c, sizeof (c)); // if (c!= ',' ) continue ;} } else { while (c!= '
' ) read(fd,&c, sizeof (c)); continue ; // while ， } } } } else if (c!= 'E' &&c!= ',' ) { xinxi[i]=c; ++i; } else { while (c!= '
' ) read(fd,&c, sizeof (c)); continue ;} } // if (bytes==-1) { perror ( "read" ); return -1; } int m; for (m=0;xinxi[m];++m) printf ( "%c" ,xinxi[m]); printf ( "
" ); return 0; }