Exercise_TheCProgrammingLanguage/Exercise_3.2_escape.cpp at master · gz-lenk/Exercise_TheCProgrammingLanguage · GitHub

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#include<stdio.h>

void escape(char *s, char *t);
void unescape(char *s, char *t);

int main(void){
	char text1[50];
	char text2[50];

	printf("Original string:\n%s\n",text1);

	escape(text2, text1);
	printf("Escaped string:\n%s\n",text2);

	unescape(text1,text2);
	printf("Escaped string:\n%s\n",text1);

	return 0;
}

void escape(char *s, char *t){
	int i,j;
	i=j=0;

	while(t[i]){
		switch( t[i] ) {
		case '\n':
			s[j++] = '\\';
			s[j] = 'n';
			break;
		case '\t':
		    s[j++] = '\\';
		    s[j] = 't';
			break;
		case '\a':
		    s[j++] = '\\';
		    s[j] = 'a';
			break;
		case '\b':
		    s[j++] = '\\';
			s[j] = 'b';
			break;
		case '\f':
		    s[j++] = '\\';
		    s[j] = 'f';
			break;
		case '\r':
		    s[j++] = '\\';
		    s[j] = 'r';
			break;
		case '\v':
			s[j++] = '\\';
			s[j] = 'v';
			break;
		case '\\':
			s[j++] = '\\';
			s[j] = '\\';
			break;
		case '\"':
			s[j++] = '\\';
			s[j] = '\"';
			break;
		default:
			s[j] = t[i];
			break;
		}
		++i;
		++j;
	}
	s[j]=t[i];
}