isalnum cpp code example
Example 1: isalnum in c
int main()
{
char c;
int result;
c = '5';
result = isalnum(c);
printf("When %c is passed, return value is %d\n", c, result);
c = 'Q';
result = isalnum(c);
printf("When %c is passed, return value is %d\n", c, result);
c = 'l';
result = isalnum(c);
printf("When %c is passed, return value is %d\n", c, result);
c = '+';
result = isalnum(c);
printf("When %c is passed, return value is %d\n", c, result);
return 0;
}
Example 2: c++ isalphanum
string test = "Ab4 :";
std::isalnum(test[0]); //true
std::isalnum(test[1]); //true
std::isalnum(test[2]); //true
std::isalnum(test[3]); //false
std::isalnum(test[4]); //false