I'm kinda stuck on this one. When I run my program all of the letters that loop past z do not print for some reason. The problem comes from this link: http://docs.cs50.net/2016/x/ap/problems/caesar/caesar.html Here is my code:
#include <stdio.h>
#include <stdlib.h>
#include <cs50.h>
#include <ctype.h>
#include <string.h>
int main(int argc, string argv[])
{
if (argv[1] != NULL)
{
int k = atoi(argv[1]);
if ((argc == 2) && (k >= 0))
{
printf("Type what you would like to encrypt!\n");
string text = GetString();
for (int i = 0, n = strlen(text); i < n; i++)
{
if (isalpha(text[i]) || isspace(text[i]))
{
if (isupper(text[i]))
{
text[i] = text[i] + k;
if (text[i] > 'Z')
{
text[i] = text[i] - 26;
printf("%c", text[i]);
}
else
printf("%c", text[i]);
}
else if (islower(text[i]))
{
text[i] = text[i] + k;
if (text[i] > 'z')
{
text[i] = text[i] - 26;
printf("%c", text[i]);
}
else
printf("%c", text[i]);
}
else if (isspace(text[i]))
{
printf(" ");
if (isupper(text[i + 1]))
{
text[i + 1] = text[i + 1] + k;
if (text[i + 1] > 'Z')
{
text[i + 1] = text[i + 1] - 26;
printf("%c", text[i + 1]);
}
else
printf("%c", text[i + 1]);
}
else if (islower(text[i + 1]))
{
text[i + 1] = text[i + 1] + k;
if (text[i + 1] > 'z')
{
text[i + 1] = text[i + 1] - 26;
printf("%c", text[i + 1]);
}
else
printf("%c", text[i + 1]);
}
i++;
}
}
else
printf("%c", text[i]);
}
printf("\n");
return 0;
}
else
printf("Usage: ./caesar <non-negative integer>\n");
return 1;
}
else
printf("Usage: ./caesar <non-negative integer>\n");
return 1;
}
When I input "./caesar 13" (13 being the encryption key) into my terminal, I get prompted to input my desired text. However, when I input "matteo maTTeo", I get the output of: "znrb znGGrb". Why is this the case? I am pretty new to coding, so if the answer is obvious, go easy on me please! Thanks!
