New answers tagged pset2
1
You have a structural problem. You're trying to create main(), followed by a function called is_valid_key), but you have some errors in how you did it.
The main() function (yes, it's technically a function, with a special name) should end with a closing curly brace, before the start of any other functions. This code has the closing curly brace at the very ...
1
Look at this line:
for (int i = 0; i < strlen(argv[i]); i++)
Here you're trying to iterate over all arguments in the command line when you should iterate only over the second argument. To fix this you can create a variable:
string x = argv[1];
for (int i = 0; i < strlen(x); i++)
or use the address:
for (int i = 0; i < strlen(&argv[1][i]); i++)...
0
I found out an approach to solve this-
int main(int argc, string argv[])
{
char c[strlen(argv[1])];
for (int i=0; i<strlen(argv[1]); i++ )
{
c[i] = argv[1][i];
//printf("%c\n", argv[1][i]);
}
printf("%s\n", c);
if (argc ==2 && isdigit(c[0]))
{
int k = c[0];
string ip = get_string("plaintext:");
}
...
1
This is a common newbie error. The problem lies here:
isdigit(argv[1])
The isdigit() function and all of it's issomething() functions take a single char as input. But, argv[1] is a string, not a single char. This code is taking a string and shoving it down isdigit's throat, so it chokes and coughs up a seg fault.
The code needs to check each char in argv[1]...
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