//16进制字符串转换成10进制数据 #include "stdafx.h" #include <string.h> bool IsValidateStr16(const char *str); int StrToNumber16(const char *str); int Char16ToInt(char c);int main(int argc, char* argv[]) {int num;char str[] = "00Ff";bool flag;flag = IsValidateStr16(str);if (true == flag){printf("The str is ValidateStr16/n");num = StrToNumber16(str);printf("The 10 numbers is:%d/n", num);}elseprintf("The str is not ValidateStr16/n");return 0; }bool IsValidateStr16(const char *str) {int len,i;if (NULL == str){return false;} len = strlen(str);for (i = 0; i < len; i++){if (!((str[i] >= '0' && str[i] <= '9') || (str[i] >= 'A' && str[i] <= 'F')|| (str[i] >= 'a' && str[i] <= 'f')))//满足条件之一0~9或者a~z或者A~Z都是合法的十六进制字符return false; }return true; }int StrToNumber16(const char *str) {int len,i,num;num = 0;//使用数据必须初始化否则产生不确定值len = strlen(str);for (i = 0; i < len; i++){num = num*16 + Char16ToInt(str[i]);/*十六进制字符串与10进制的对应数据*/ }return num;}int Char16ToInt(char c) {int num;num = 0;//switch (c){case '0':num = 0;break;case '1':num = 1;break;case '2':num = 2;break;case '3':num = 3;break;case '4':num = 4;break;case '5':num = 5;break;case '6':num = 6;break;case '7':num = 7;break;case '8':num = 8;break;case '9':num = 9;break;case 'a':case 'A':num = 10;break;case 'b':case 'B':num = 11;break;case 'c':case 'C':num = 12;break;case 'd':case 'D':num = 13;break;case 'e':case 'E':num = 14;break;case 'f':case 'F':num = 15;break;default:break;}return num; }

参考来源：http://www.cnblogs.com/k-eckel/articles/188523.html