带有无符号字符字符串的getline

所以，我搜索了一下为什么我的编译器会给出一个错误：

49 ~C++SHA-1main.cpp invalid conversion from `unsigned char*' to `char*' 

我发现你不能在无符号字符和字符之间转换，因为它们是完全不同的类型。因此，这导致我在代码中需要一个getline函数和一个无符号的char字符串。

#include <iostream>
#include <stdint.h>
using namespace std;
uint32_t rotl( uint32_t value, int shift)
{
         if ((shift &= sizeof(value)*8 - 1) == 0) return value;
         return (value << shift) | (value >> (sizeof(value)*8 - shift));
}
uint32_t rotr( uint32_t value, int shift)
{
         if ((shift &= sizeof(value)*8 - 1) == 0) return value;
         return (value >> shift) | (value << (sizeof(value)*8 - shift));
}
int textInput();
int hexInput();
int binInput();
unsigned char message[64];
int SHA_1();
int main()
{
    int selection;
    cout<<"Select Input type:nnt1. Text Stringnt2. Hex Stringnt3. Binary Stringn";
    cin>>selection;
    cin.ignore();
    switch(selection)
    {
                     case 1: textInput(); break;
                     case 2: hexInput(); break;
                     case 3: binInput(); break;
    }
    SHA_1();
    cout<<"ndone";
    cin.get();
    return 0;
}
int textInput()
{
    unsigned char input[63] = {0};
    cout<<"Enter a text string to be hashednn";
    cin.getline(input, 62, 'n');
    cin.ignore();
    for(int x = 0; x <= 63; x++)
            {
                 //cout<<x<<"n";
                 if (input[x] == 0x00)
                 {
                              message[x] = 0x00000080;
                              message[63] = x; //This might be wrong.
                              //cout<<std::hex<<message;
                              break;
                 }
                 else message[x] = input[x];
            }
    return 0;
}
int hexInput()
{
    return 0;
}
int binInput()
{
    return 0;
}
int SHA_1()
{
    uint32_t h0 = 0x67452301;
    uint32_t h1 = 0xEFCDAB89;
    uint32_t h2 = 0x98BADCFE;
    uint32_t h3 = 0x10325476;
    uint32_t h4 = 0xC3D2E1F0;
    uint32_t a;
    uint32_t b;
    uint32_t c;
    uint32_t d;
    uint32_t e;
    uint32_t f;
    uint32_t k;
    uint32_t temp;
    uint32_t w[80];
    /*for( int m = 0; m <= 63; m++)
    {
         cout<<"message["<<m<<"]="<<std::hex<<int(message[m])<<std::dec<<"n";
    }*/
    for( int i = 0; i <= 15; i++)
    {
         w[i] = ((message[(i*4)] << 24) | (message[(i*4) + 1] << 16) | (message[(i*4) + 2] << 8) | (message[(i*4) + 3]));
         //cout<<"W["<<i<<"]="<<std::hex<<w[i]<<std::dec<<"n";
    }
    for( int i = 16; i <= 79; i++)
    {
         w[i] = rotl((w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]), 1);
    }
    a = h0;
    b = h1;
    c = h2;
    d = h3;
    e = h4;
    for(int iteration = 0; iteration <= 79; iteration++)
    {
            if((0 <= iteration) && (iteration <= 19))
            {
                  f = ((b & c) | ((~b) & d));
                  k = 0x5A827999;
            }
            else if((20 <= iteration) && (iteration <= 39))
            {
                  f = (b ^ c ^ d);
                  k = 0x6ED9EBA1;
            }
            else if((40 <= iteration) && (iteration <= 59))
            {
                  f = ((b & c) | (b & d) | (c & d));
                  k = 0x8F1BBCDC;
            }
            else if((60 <= iteration) && (iteration <= 79))
            {
                  f = (b ^ c ^ d);
                  k = 0xCA62C1D6;
            }
            temp = (rotl( a, 5) + f + e + k + w[iteration]);
            e = d;
            d = c;
            c = rotl( b, 30);
            b = a;
            a = temp;
    }
    h0 = h0 + a;
    h1 = h1 + b;
    h2 = h2 + c;
    h3 = h3 + d;
    h4 = h4 + e;
    cout<<hex<<h0<<" "<<h1<<" "<<h2<<" "<<h3<<" "<<h4;

    return 0;
}

如果有人能给我一些建议，那将是有帮助的。

感谢