How to express '\n' in testcase of input?

[zgjava]

include < stdio.h >

int main()
{
int i;
char c;
char c1[81],c2[81];
printf("input cipher code:");
for(i=0;(c=getchar())!='\n';i++)
{
c1[i]=c;
if((c>='A'&&c<='Z')||(c>='a'&&c<='z'))
{
if(c>='A'&&c<='Z')
c=(90+65)-c;
else c=122+97-c;
c2[i]=c;
}
else c2[i]=c;
}
c1[i]='\0';
c2[i]='\0';
printf("\ncipher code :%s", c1);
printf("\noriginal text:%s\n",c2);
return 0;
}

[zgjava]

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