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in Ceasar, whenever I run check50, I get this error: :( encrypts "a" as "b" using 1 as key \ expected output, but not "plainText:" :( encrypts "barfoo" as "yxocll" using 23 as key \ expected output, but not "plainText:" ... Though I tried each input and got the output correctly !I can't seem to figure out where the problem is, so a little help would be very appreciated! #include #include #include #include #include

int main(int argc, string argv[]){

 int key=atoi(argv[1]) ;     //turn key into integer
int alphaLetter,i;
 int ciphered[30];           //the ciphered text
if(argc!=2 || key<0){
    printf("make sure you entered a positive key number, and only 2 command 
line arguments!");
return 1;
}
else {
 printf("plainText: ");        //prompt for plain text
string plainText= get_string();

for(i=0;i<strlen(plainText);i++){
if (isalpha(plainText[i])){
    if(isupper(plainText[i])){
       alphaLetter= plainText[i]-65;        //convert ASCII to Alpha
       ciphered[i]= (alphaLetter + key)%26; //ceaser
       ciphered[i]=ciphered[i] +65;         // convert Alpha back to ASCII
 }
    else{
        alphaLetter= plainText[i]-97;        //convert ASCII to Alpha
        ciphered[i]= (alphaLetter + key)%26; //ceaser
        ciphered[i]=ciphered[i] +97;         // convert Alpha back to ASCI
    }}
else{
    ciphered[i]=plainText[i];            //if the input isn't a letter "!, etc", print it as it is
    }
}
printf("\ncipherText:");
for(i=0;i<strlen(plainText);i++){
 printf("%c", ciphered[i]);
}
printf("\n");
}
return 0;
}
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check50 is very picky about spelling, even about case. Try plaintext and ciphertext rather than Text.

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