C庫函數(shù)void isgraph(int c) 檢查,如果字符的圖形表示。
用圖形表示的字符是所有可打印的字符,除空白字符(如''),這是不考慮為isgraph字符。
以下是isgraph()函數(shù)的聲明。
int isgraph(int c);
c -- 這是要檢查的字符。
這個(gè)函數(shù)返回非零值,如果c具有圖形表示字符,否則為0
下面的例子演示了如何使用isgraph()函數(shù)。
#include <stdio.h> #include <ctype.h> int main() { int var1 = '3'; int var2 = 'm'; int var3 = ' '; if( isgraph(var1) ) { printf("var1 = |%c| can be printed ", var1 ); } else { printf("var1 = |%c| can't be printed ", var1 ); } if( isgraph(var2) ) { printf("var2 = |%c| can be printed ", var2 ); } else { printf("var2 = |%c| can't be printed ", var2 ); } if( isgraph(var3) ) { printf("var3 = |%c| can be printed ", var3 ); } else { printf("var3 = |%c| can't be printed ", var3 ); } return(0); }
讓我們編譯和運(yùn)行上面的程序,這將產(chǎn)生以下結(jié)果:
var1 = |3| can be printed var2 = |m| can be printed var3 = | | can't be printed