#include<stdio.h>

#include<math.h>

#include<string.h>

//其他任意进制转换为十进制

int main()

{

int trans(char a[],int );

char strupr(char );

char arr[100];

int t;

printf("请输入进制的类型:");

scanf("%d",&t);

printf("请输入该进制的数:");

scanf("%s",arr);

int num = trans(arr,t);

printf("该数的十进制是:%d\n",num);

return 0;

}

char strupr(char ch)//小写字母转换为大写字母

{

if(ch>='a' && ch<='z')

{

ch = ch - 32;

}

printf("%c",ch);

return ch;

}

int trans(char chs[],int m)//转换为十进制

{

char *p = chs;

int len = strlen(p);

int temp,sum=0;

while(len>0)

{

char ss = strupr(*p);

if(ss>='0' && ss<='9')

{

temp = (ss-'0')*pow(m,len-1);//m表示进制类型(2、8、16)

sum = sum + temp;

}

if(ss>='A' && ss<='F')

{

temp = (ss-'A'+10)*pow(m,len-1);

sum = sum + temp;

}

p++;

len--;

}

printf("\n");

return sum;

}