二十五岁时我们都一样愚蠢、多愁善感，喜欢故弄玄虚，可如果不那样的话，五十岁时也就不会如此明智。
标题：C库函数 isxdigit()
C库函数 isxdigit()
#include <stdio.h> #include <ctype.h> int main () { char var1[] = "tuts"; char var2[] = "0xE"; if( isxdigit(var1[0]) ) { printf("var1 = |%s| is hexadecimal character\n", var1 ); } else { printf("var1 = |%s| is not hexadecimal character\n", var1 ); } if( isxdigit(var2[0] )) { printf("var2 = |%s| is hexadecimal character\n", var2 ); } else { printf("var2 = |%s| is not hexadecimal character\n", var2 ); } return(0); }
