ispunct() - C函數
C庫函數 int ispunct(int c) 檢查傳遞的字符是否是標點符號品格的標點符號是任何圖形字符（如isgraph）這是不是字母，數字（isalnum），。
聲明
以下是ispunct（）函數的聲明。
int ispunct(int c);
參數
- c -- 這是要檢查的字符。
返回值
這個函數如果c是一個標點符號一樣返回一個非零值（true），否則返回零（false）
例子
下面的例子顯示ispunct（）函數的用法。
#include <stdio.h> #include <ctype.h> int main() { int var1 = 't'; int var2 = '1'; int var3 = '/'; int var4 = ' '; if( ispunct(var1) ) { printf("var1 = |%c| is a punctuation character
", var1 ); } else { printf("var1 = |%c| is not a punctuation character
", var1 ); } if( ispunct(var2) ) { printf("var2 = |%c| is a punctuation character
", var2 ); } else { printf("var2 = |%c| is not a punctuation character
", var2 ); } if( ispunct(var3) ) { printf("var3 = |%c| is a punctuation character
", var3 ); } else { printf("var3 = |%c| is not a punctuation character
", var3 ); } if( ispunct(var4) ) { printf("var4 = |%c| is a punctuation character
", var4 ); } else { printf("var4 = |%c| is not a punctuation character
", var4 ); } return(0); }
讓我們編譯和運行上面的程序，這將產生以下結果：
var1 = |t| is not a punctuation character
var2 = |1| is not a punctuation character
var3 = |/| is a punctuation character
var4 = | | is not a punctuation character