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trans程序的源代码在Msys下用gcc编译调试通过。

使用说明：trans  [-r/-s] srcfile objfile

    其中，-R 将摩斯码翻译成英文；
          -S 将英语翻译成摩斯码。
          srcfile为需要翻译的文本文件。运行成功后结果会保存在objfile文件中。

    注意：若是翻译英文，须保证所有字母均为大写字母。且标点符号仅可为“.”和“,”

代码已上传至github https://github.com/longqzh/MorseCode_Translator

/* *******************************
 *
 * Translator for Morse Code
 *
 * Author: Long Qianzhi
 * Date:2010/1/28
 *
 * *******************************/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define MAX 39

struct table{
	char letter;
	char mor[8];
}table[]={
	{'A',".-"},{'B',"-..."},{'C',"-.-."},
	{'D',"-.."},{'E',"."},{'F',"..-."},
	{'G',"--."},{'H',"...."},{'I',".."},
	{'J',".---"},{'K',"-.-"},{'L',".-.."},
	{'M',"--"},{'N',"-."},{'O',"---"},
	{'P',".--."},{'Q',"--.-"},{'R',".-."},
	{'S',"..."},{'T',"-"},{'U',"..-"},
	{'V',"...-"},{'W',".--"},{'X',"-..-"},
	{'Y',"-.--"},{'Z',"--.."},{'0',"-----"},
	{'1',".----"},{'2',"..---"},{'3',"...--"},
	{'4',"....-"},{'5',"....."},{'6',"-...."},
	{'7',"--..."},{'8',"---.."},{'9',"----."},
	{'.',".-.-.-"},{',',"--..--"},{' ',".--.-."},
	{'\n',""}
};

FILE *infp=NULL, *outfp=NULL;

void check_file(char *in, char *out)
{
	if((infp=fopen(in,"r"))==NULL){
		printf("\nCan't open source file : %s\n", in);
		exit(1);
	}
	else if ((outfp=fopen(out,"w"))==NULL){
		printf("\nCan't open output file : %s\n", out);
		exit(1);
	}
	return;
}

int file_size(FILE *fp)
{
	int fsize=0;
	char c;
	while((c=fgetc(fp))!=EOF)
		fsize++;
	rewind(fp);
	return fsize;
}

char* make_buf(int n)
{
	char *pstr;
	pstr=(char *)malloc(n*sizeof(char));
	if(pstr==NULL){
		printf("\nMalloc failed!\n");
		exit(1);
	}
	return pstr;
}

void m2t()
{
	char *buffer;
	int fnum,n=0,i=0;
	char tmp[8]="";

	/* Read all of the data from srcfile to buffer.*/
	fnum=file_size(infp);
	buffer=make_buf(fnum+1);
	if((fread(buffer,sizeof(char),fnum,infp))!=fnum){
		printf("\nSomething wrong about reading file!\n");
		exit(1);
	}
	*(buffer+fnum)='\0';
	fclose(infp);

	printf("%s\n",buffer);fflush(stdout);

	while(*buffer!='\0'){

		/* Read a word from buffer to tmp.*/
		while(*buffer!=' ' && *buffer!='\0'){
			tmp[n++]=*buffer++;
			if(n>7){
				tmp[7]='\0';
				printf(" %s : Bad MorseCode!\n", tmp);
				exit(1);
			}
		}
		tmp[n]='\0';
		n=0; 
		printf("%s\t",tmp);fflush(stdout);
		

		while(strcmp(tmp,table[i++].mor)){
			if(i>=MAX && *(buffer+1)!='\0'){
				printf(" %s : CANNOT find it!\n", tmp);
				exit(1);
			}
		}

		fputc(table[--i].letter,outfp);
		printf("%c\t",table[i].letter);fflush(stdout);
		i=0;
		buffer++;
	}
	fclose(outfp);
	printf("The translated file is created.\n");
	fflush(stdout);
}

void t2m()
{
	char *buffer;
	int fnum,i=0;

	/* Read all of the data from srcfile to buffer.*/
	fnum=file_size(infp);

	buffer=make_buf(fnum+1);
	if((fread(buffer,sizeof(char),fnum,infp))!=fnum){
		printf("\nSomething wrong about reading file!\n");
		exit(1);
	}
	*(buffer+fnum)='\0';
	fclose(infp);

	printf("%s %d\n", buffer,(int)(*buffer));fflush(stdout);

	while(*buffer!='\0'){
		/* find the MorseCode according to character.*/
		while(*buffer!=table[i].letter){
			
			i++;
			fflush(stdout);
			if(i>MAX && *buffer!=EOF){
				printf(" %c %d: Bad character\n", *buffer,(int)(*buffer));
				exit(1);
			}
		}
		buffer++;
		printf("%c-->%s\t\n",table[i].letter,table[i].mor);fflush(stdout);

		fputs(table[i].mor,outfp);
		fputc(' ',outfp);
		i=0;
	}
	fclose(outfp);
	printf("The translated file is created.\n");
	fflush(stdout);
}

int main(int argc,char *argv[])
{
	if (argc!=4){
		printf("Usage: trans [-R/-S] srcfile outfile\n");
		printf("\n\t -r translate Morse to English.");
		printf("\n\t -s translate English to Morse.");
		printf("\n\t -h show this help information.\n");
		fflush(stdout);
		return 1;
	}

	if (!strcmp(argv[1],"-r") || !strcmp(argv[1],"-R")){
		check_file(argv[2],argv[3]);
		m2t();
	}
	else if (!strcmp(argv[1],"-s") || !strcmp(argv[1],"-S")){
		check_file(argv[2],argv[3]);
		t2m();
	}else{
		printf("You input wrong arguments!\n");
		printf("Please type \"trans -h\".\n");
		fflush(stdout);
	}
	return 0;
}