file option 失敗與查錯
阿新 • • 發佈:2019-01-06
#include<stdio.h> #include<ctype.h> /* I don't understand that av[ac]會自動新增下面的內容 1q XDG_SESSION_ID=2291 HOSTNAME=shenhao TERM=xtermSHELL=/bin/bash HISTSIZE=1000 SSH_CLIENT=101.230.196.33 52079 22SSH_TTY=/dev/p129 I have doubted that av[ac-1] but adding sprintf is successful; */ //my getchar using is error /* int getchar(void) { static char buf[BUFSIZ]; static char* bb=buf; static int n=0; if(n==0) { n=read(0,buf,BUFSIZ); bb=buf; } return(--n>=0)?(unsigned char)*bb++:EOF; } */ //We can find value of return is int and EOF 's value is -1 //so can't use NULL int mian() { char c; if((c = getchar()) == NULL) return -1; else } //that is right code int main() { int c; while ( ( c=getchar() ) != EOF ){ if ( c == 'z' ) c = 'a'; else if (islower(c)) c++; putchar(c); } } //that is my implement int main(int ac, char* av[]) { int i = 0; char buf[20]; if(ac == 1) return -1; while (1) { sprintf(buf,"%s",av[ac-1]); if( buf[i] == 'z') { buf[i] = 'a'; } else { buf[i] ++; if(buf[i] == 'Q' || buf[i] == 'q') break; } i++; } printf("%d\n",i); fprintf(stdout,"%s",buf); return 0; }