入力文字が C の文字、数字、または特殊文字であるかどうかを確認する

#include  #include  main() { char ch; printf("Enter a character: "); scanf("%c", &ch); if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) printf("This is an alphabet"); else if(ch >= '0' && ch <= '9') printf("This is a number"); else printf("This is a special character"); }

Enter a character: F This is an alphabet

Enter a character: r This is an alphabet

Enter a character: 7 This is a number

Enter a character: # This is a special character