Question

将一个C 语言源程序文件中所有注释去掉后，存入另一个文件。

Answer 1

我以前写了一个，功能都实现了，但就是执行后，程序格式有点不够整齐，所以只可以给你参考
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define SIZE 100int mode = 0;
//char *deal(char *buf,)
void delete(int argc,char **argv) {
if(2 != argc) {
printf("usage:%s file\n",argv[0]);
exit(-1);
}
FILE *fp0 = fopen(argv[1],"r+");
if(NULL == fp0) {
perror("fopen file");
exit(-1);
}
FILE *fp1 = tmpfile();

if(NULL == fp1) {
perror("fopen temp");
exit(-1);
}

int i=0;
char c,buf[3];
while((c=fgetc(fp0)) != EOF) {
buf[i] = c;
switch(mode) {
case 0:

if('/' == c) {
mode = 1;
} else if('"' == c) {
mode = 2;
} else {
fputc((int)c,fp1);
}
break;
case 1:
if('/' == c) {
mode = 4;
}
else if('*' == c) {
mode = 5;
}
else {
fputc('/',fp1);
mode = 0;
if('"' == c) {
mode = 2;
}
else {
fputc((int)c,fp1);
}
}
break;
case 2:
if(39 == buf[i]&&39 == buf[(i+1)%3]) {
mode = 0;
fputc('"',fp1);
fputc(39,fp1);
}
else {
fputc('"',fp1);
fputc((int)c,fp1);
mode = 3;
if('"' == c) {
mode = 0;
}
}
break;
case 3:
fputc((int)c,fp1);
if('"' == c) {
mode = 0;
}

break;
case 4:
if('\n' == c) {
mode = 0;
}
break;
case 5:
if('*' == c) {
mode = 6;
}
break;
case 6:
printf("%c",c);
if('/' == c) {
mode = 0;
} else {
mode = 5;
}
break;
default:
printf("program wrong!\n");
exit(-1);
}
i++;
i%=3;
}
fclose(fp0);
fp0 = fopen(argv[1],"w+");
if(NULL == fp0) {
perror("fopen file");
exit(-1);
}

rewind(fp1);
char a[SIZE];
memset(a,0,sizeof(a));
while(i = fread(a,1,99,fp1)) {
fwrite(a,1,i,fp0);
}

fclose(fp0); fclose(fp1);
}
int main(int argc,char **argv) { delete(argc,argv);
return 0;
}

Answer 2

比对// 跟 /* */
读源程序，建新文件，比对之后存入新文件，//之后的内容不存，直到换行，/*之后的不存 直到*/

Answer 3

(⊙_⊙)?
你的意思是用程序删掉?还是手动删掉?

Answer 4

#include<stdio.h>
int main()
{
FILE *fp1, *fp2;
char num[1000];
int i = 0;
if ((fp1 = fopen("text1.txt", "r+")) == NULL)
printf("wrong - ---- text1.txt");
if ((fp2 = fopen("text2.txt", "r+")) == NULL)
printf("wrong _____text2.txt");
for (i = 0; i < 1000; i++)
{
num[i] = fgetc(fp1);
}
i = 0;
while (i!= 1000)
{
if(num[i] == '/')
if (num[i + 1] == '/')
{
num[i] = NULL;
num[i + 1] = NULL;
}
if(num[i] == '*')
if (num[i + 1] == '/')
{
num[i] = NULL;
num[i + 1] = NULL;
}
if(num[i] == '/')
if (num[i + 1] == '*')
{
num[i] = NULL;
num[i + 1] = NULL;
}

i++;
}
for (i = 0; i < 1000; i++)
fputc(num[i], fp2);
//fprintf(fp2, "%s", num);
fclose(fp1);
fclose(fp2);
return 0;
}