c语言 输入16进制形式的字符串转换成16进制

#include stdio.h>int IsHexChar(char ch){if((ch>='0' && ch='a' && ch='A' && ch<='F'))return 1;elsereturn 0;}int main(){char str[1000] = "123342abcdAFB1H";int cnt = 0;int i;printf("input str:\n&quo