基本功练习_2_24_3之字符串转数字

int main(void)

{

         inti =0, n=0;

        

         charstr[]="12345";

         while(str[i]!='\0')

         {

                   n=n*10+(str[i]-'0');

                   i++;

         }

        

         printf("数值：%d\n", n);

        

         return0;

}