Untitled
unknown
plain_text
3 months ago
635 B
5
Indexable
#include <stdio.h> #include <ctype.h> void main() { char a[10]; int flag = 1, i = 0; printf("\nEnter an identifier: "); fgets(a, sizeof(a), stdin); a[strcspn(a, "\n")] = '\0'; if (isalpha(a[0])) { flag = 1; } else { printf("\nNot a valid identifier\n"); return; } while (a[i] != '\0') { if (!isdigit(a[i]) && !isalpha(a[i])) { flag = 0; break; } i++; } if (flag == 1) { printf("\nValid identifier\n"); } else { printf("\nNot a valid identifier\n"); } }
Editor is loading...
Leave a Comment