Input:1 Output:Entered character is alphanumeric Input:A Output:Entered character is alphanumeric Input:& Output:Entered character is not alphanumeric // C code to illustrate isalphanum() #include <ctype.h> #include <stdio.h> int main() { char ch = 'a'; // checking is it alphanumeri...
#include <cctype> // for isalnum() function, not used in this example but may be needed in a realworld program (e.g., to check if a character is alphanumeric)
该函数用于判断某个字符是否为字母或数字,如果是字母或数字则返回非零值,否则返回零。 函数用法 以下为函数的使用示例: #include <stdio.h> #include <ctype.h> int main() { char c = '1'; if (isalnum(c)) { printf("%c is alphanumeric\n", c); } else { printf("%c is not alphanumeric\...
_tprintf(_T("Next Char ='%c'\tPrev Char = '%c' "), *pNext, *pPrev); if (IsCharAlpha(*pNext)) { _tprintf(_T("'%c' is Alpha"),*pNext); } else if (IsCharAlphaNumeric(*pNext)) { _tprintf(_T("'%c' is Alpha Numberic"),*pNext); } else { _tprintf(_T("'%c'is Unk...
Check a char: is it a alphanumeric char #include <ctype.h> #include <stdio.h> int main(void) { char ch; for(;;) { ch = getchar(); if(ch=='.') break; if(isalnum(ch)) printf("%c is alphanumeric\n", ch); } return 0; } Related...
char str[]=”123c@#FDsP[e?”; int i; for (i=0;str[i]!=0;i++ ) if ( isalnum(str[i])) printf(“%c is an alphanumeric character\n”,str[i]); } 执行 1 is an apphabetic character 2 is an apphabetic character 3 is an apphabetic character c is an apphabetic character...
char str[] = "123c@#FDsP[e?"; int i; for (i = 0; str[i] != 0; i++) if(isalnum(str[i])) printf("%c is an alphanumeric character\n", str[i]); } 执行1 is an apphabetic character 2 is an apphabetic character ...
Otherwise, zero is returned. char c; scanf( "%c", &c ); if( isalnum(c) ) printf( "You entered the alphanumeric character %c/n", c ); Related topics: isalpha iscntrl isdigit isgraph isprint ispunct isspace isxdigit isalpha Syntax: #include <ctype.h> int isalpha( int ch ); The ...
char str[] = "123c@#FDsP[e?";int i;for (i = 0; str[i] != 0; i++)if(isalnum(str[i]))printf("%c is an alphanumeric character\n", str[i]);} 输出结果：1 is an apphabetic character 2 is an apphabetic character 3 is an apphabetic character c is an appha...
int isalnum(char ch); 功能:如果参数是数字或字母字符,函数返回非零值,否则返回零值 1 #include <ctype.h> 2 #include <stdio.h> 3 4 int main() 5 { 6 char c; 7 scanf("%c", &c); 8 if(isalnum(c)) 9 printf("You entered the alphanumeric character %c\n", c); ...