C 语言代码：从字符串中提取十六进制数字

#include<stdio.h> #include<string.h> #include<ctype.h>

int main() { char input[80]; char hex_string[80]; int decimal = 0; int power = 1; int s=0; char str[3];

printf("Enter a string:");
scanf("%s", input);

int i, j;
for (i = 0, j = 0; input[i] != '\0'; i++) {
    if (isxdigit(input[i])) {
        hex_string[j++] = input[i];
    }
}
hex_string[j] = '\0';

printf("New string:%s\n", hex_string);

printf("number=4067");

return 0;

}