c++ - isalpha : If argv is not alphabets. How to conditionise? -

i have made program accepts 2 command line arguments in first argument file name itself, , second alphabetical keyword. if have reject numeric argument how conditionise, or write?

my pseudocode:

if argv[1] not alphabets reject it(return 1).

how do this? sorry i'm newbie computer programming , c in particular.

edit: second argument string. have check user enters string , no numberic value. if user inputs number, or string number( bacon11 ), program should reject , return 1; should do?

my code looks this:

 // reject numeric value (int = 0, n = strlen(argv[1]); < n; i++) {     if //todo: if letter not letter reject it.     {         return 1;     } } 

what should write in todo line? cant conditionise code!

you can use isalpha function.

edit: code seems in way. nevertheless, not work, can give clues!

• check this tutorials understand if statement (you check isalpha example).
• don't forget argv 2 dimensional character array. specific character of argument can do: argv[i][j]
• check return value of isalpha function test character.