C库函数 ispunct() C库函数 isprint() C库函数 isspace() C库函数 ispunct() #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\n", var1 ); } else { printf("var1 = |%c| is not a punctuation character\n", var1 ); } if( ispunct(var2) ) { printf("var2 = |%c| is a punctuation character\n", var2 ); } else { printf("var2 = |%c| is not a punctuation character\n", var2 ); } if( ispunct(var3) ) { printf("var3 = |%c| is a punctuation character\n", var3 ); } else { printf("var3 = |%c| is not a punctuation character\n", var3 ); } if( ispunct(var4) ) { printf("var4 = |%c| is a punctuation character\n", var4 ); } else { printf("var4 = |%c| is not a punctuation character\n", var4 ); } return(0); } C库函数 isprint() C库函数 isspace()