C++注释转换为C语言的注释

#include<stdlib.h> #include<stdio.h> #define MAX_LINE_LENGTH 250 #define handle_c_comment(ch,sbuf)\ {\ while(1){\ if(*ch == '\0'){\ if(fgets(sbuf, MAX_LINE_LENGTH, infile) == NULL){\ fprintf(stderr, "Error: Probably syntax error becase reach EOF before the end of comment\n");\ exit(1);\ }\ ch = sbuf;\ }\ while(*ch != '/' && *ch != '\0'){\ fputc(*ch, outfile);\ ++ch;\ }\ if(*ch == '\0') continue;\ else{\ fputc('/',outfile);\ if(*(ch-1) == '*'){\ ++ch;\ break;\ }else{\ ++ch;\ }\ }\ }\ } #define handle_cpp_comment(ch,sbuf)\ {\ fputc('*',outfile);\ ++ch;\ while(1){\ if( *ch == '\0'){\ if(fgets(sbuf, MAX_LINE_LENGTH, infile) == NULL){\ fputs("*/",outfile);\ exit(0);\ }else {\ ch = sbuf;\ }\ }\ while(*ch != '\n' && *ch != '\0' && *ch != '/'){\ fputc(*ch,outfile);\ ++ch;\ }\ if(*ch == '\n'){\ fputs("*/\n",outfile);\ ++ch;\ break;\ }else if (*ch == '/'){\ if(*(ch-1) == '*' ){\ fputs(" /",outfile);\ }else{\ fputc('/', outfile);\ }\ ++ch;\ }\ }\ } #define handle_string(ch,sbuf)\ {\ fputc('\"', outfile);\ ++ch;\ while(1){\ if(*ch == '\0'){\ if(fgets(sbuf, MAX_LINE_LENGTH, infile) == NULL){\ fprintf(stderr, "Error: Probably syntax error becase reach EOF before the end of string\n");\ exit(2);\ }\ ch = sbuf;\ }\ while(*ch != '\"' && *ch != '\0'){\ fputc(*ch, outfile);\ ++ch;\ }\ if(*ch == '\0') continue;\ else if(*ch == '\"'){\ fputc('\"', outfile);\ ++ch;\ break;\ }\ }\ } static int cmdargc=1; static FILE* infile = NULL; static FILE* outfile = NULL; void close_opened_files(void ); int main(int argc, char * argv[]) { char sbuf[MAX_LINE_LENGTH+1]; char* ch; atexit(&close_opened_files); if(argc == 1){ infile = stdin; outfile = stdout; }else if(argc == 2){ cmdargc = 2; infile = fopen(argv[1], "r"); outfile = stdout; }else if(argc == 3){ outfile = fopen(argv[2] ,"w"); infile = fopen(argv[1], "r"); cmdargc = 3; }else{ fprintf(stderr, "Usage: %s [in_file], [out_file]",argv[0] ); exit(3); } while(fgets(sbuf,MAX_LINE_LENGTH,infile)){ ch = sbuf; while(*ch != '\0'){ switch(*ch){ case '/': fputc(*ch, outfile); ++ch; if(*ch == '*'){ handle_c_comment(ch,sbuf); }else if(*ch == '/'){ handle_cpp_comment(ch,sbuf); }else{ fputc(*ch,outfile); ++ch; } break; case '\"': handle_string(ch,sbuf); break; default: fputc(*ch,outfile); ++ch; break; } } } exit(0); } void close_opened_files(void ) { if(cmdargc == 2) fclose(infile); else if (cmdargc == 3){ fclose(outfile); fclose(infile); } /* printf("All files closed\n ");*/ }