printf在屏幕上显示“ -858993460”。或“╠╠╠╠╠╠╠╠”；这些是什么？ [英] printf displays "-858993460" or "╠╠╠╠╠╠╠╠"; what are these?
问题描述
我正在尝试构建一个对密码进行加密的程序，然后执行相反的过程（从已加密的密码中读出正确的密码）。
I am trying to build a program that encrypts a password and then does the reverse process (tells a correct password from an encrypted one).
为此，我有：
-
密码（
char []类型）;
具有以下特征的加密密钥（ vector - int [] 类型）与密码的 char 相同的长度；
an encryption key (vector - int[] type) that has the same length as the char of the password;
两步（也放置在 int step [2]类型的 vector 中） $ c>）。
two steps (placed also in a vector of type int step[2]).
要求是必须使用以下两个步骤来构建加密过程：
The requirement is that the encryption process has to be built using these two steps:
- 第一个（<< c $ c> step [0] 中的值）用于添加从密码
char的第一个位置到加密密钥 vector 的第一个位置开始的值（ASCII），其步长等于第一步step [0];
- the first one (the value in
step[0]) is used to add the value (ASCII) starting from the first position of the passwordcharto the first position of the encryption key vector for a number of steps equal to the first stepstep[0];
例如，添加 char密码[0] 到 int键[0] ，然后添加 char密码[1] 到 int键[1] ，依此类推，其步数等于 step [0]中的值。
for example, adds char password[0] to int key[0], then adds char password[1] to int key[1] and so on for a number of steps equal to the value placed in step[0].
- 第二个（
step [1]）从密码char的ASCII值的相应位置中减去加密密码的值s等于第二步（step [1]）。
- the second one (
step[1]) subtracts from the corresponding position of the ASCII value of the passwordchar, the value of the encryption key for a number of steps equal to the second step (step[1]).
例如，从 int键[5] 减去 char密码[5] ，然后减去 char ，依此类推，其步骤数等于 int键[6] 中的密码[6] 中的值步骤[1] 。
for example, subtracts char password[5] from int key[5], then subtracts char password[6] from int key[6] and so on for a number of steps equal to the value placed in step[1].
然后重复该过程，直到密码字符的长度结束
And then, the process repeats until the end of the length of the password char.
我建立了一个下面的函数，应该这样做（将多个步骤相加，然后将多个其他步骤相减，然后重复该过程，直到密码char的末尾-加密密钥向量的长度与密码char相同。）
I built a function as below that should do this (addition for a number of steps, then subtraction for a number of other steps, and repetition of the process until the end of the password char - the encryption key vector has the same length as the password char).
结果被放置在新的向量中（用于加密）或新的 char （用于反向查找密码）。
The result is placed in a new vector (for encryption) or in a new char (for the reverse process of finding the password).
void criptareFinal(char password4[255],
int longKey1[255],
int b4,
int step2[2]) {
int encryptedPass[255];
int a = step2[0],
b = step2[1],
n = b4,
i,
ap = a,
bp = b;
for (i = 0; i < n; i++) {
if (ap > 0) {
encryptedPass[i] = longKey1[i] + password4[i];
ap--;
}
else if (bp > 0) {
encryptedPass[i] = longKey1[i] - password4[i];
bp--;
}
else if (ap == 0 && bp == 0) {
ap = a;
bp = b;
}
}
int i1;
printf("\n");
for (i1 = 0; i1 < b4; i1++)
printf("%d ", encryptedPass[i1]);
}
然后，如果我尝试 printf 矢量（用于加密过程），以显示矢量的内容，出现类似以下消息：
Then if I try to printf the vector (for encryption process) in order to show the content of the vector, a message similar to this one appears:
1090 923 916 1151 942 913 962 998 960 936 962 917 -858993460 -858993460 -858993460 -858993460 -858993460 -858993460 -858993460 -858993460
为什么显示 -858993460？
此外，如果尝试 printf char 以相反的方式显示密码（将加密的密码可读的代码）
Also, if a try to printf the char for showing the password in the reverse process (form an encrypted password to a readable one) using the following code,
void decriptareFinal(int encryptedPass5[255],
int longKey2[255],
int b5,
int steps3[2]) {
char Password1[255];
int a = steps3[0],
b = steps3[1],
n = b5,
i2,
ap = a,
bp = b;
for (i2 = 0; i2 < n; i2++) {
if (ap > 0) {
Password1[i2] = encryptedPass5[i2] - longKey2[i2];
ap--;
}
else if (bp > 0) {
Password1[i2] = longKey2[i2] - encryptedPass5[i2];
bp--;
}
else if (ap == 0 && bp == 0) {
ap = a;
bp = b;
}
}
int j2;
printf("\n");
for (j2 = 0; j2 < b5; j2++)
printf("%c", Password1[j2]);
}
然后出现此消息：
côő~ypaXOF╠╠╠╠╠╠╠╠
什么是╠？
此╠╠╠╠╠╠╠╠显示不正确（其余的côő〜ypaXOF是正确的。）
也。我尝试在字符串/向量的末尾添加手动形式 [0] ，如果这样做，则不会出现类型错误消息 -858993460 或╠╠╠╠╠╠╠╠类型出现。
它工作正常，并且告诉我 char （密码）或 int （键）是正确的。
Also. I tried to add and subtract manually form [0] to the end of the string/vector and if I do that, no error message of type -858993460 or of type ╠╠╠╠╠╠╠╠ appears.
It works fine and that tells me that the values in the char (password) or int (key) are correct.
如果很重要，我可以在 Windows 64bit 上工作，但是我会使用 Visual Studio 。
另外，我有一台 Mac 。那里我有同样的问题，但是我得到了 -858993460 或╠╠╠╠╠╠╠╠消息（例如 0 而不是 -858993460 ）。
If it is of importance, I work on Windows 64bit, but I use Visual Studio.
Also, I have a Mac. There I have the same problem, but instead of -858993460 or ╠╠╠╠╠╠╠╠ I get other messages (for instance 0 instead of -858993460).
推荐答案
尤其是Arkku，谢谢大家的回答。
很有帮助。
我修复了它，现在工作正常。
我在 else if（ap == 0&& bp == 0）之后的最后一个条件中添加了 i = i-1，以便在同一位置进行迭代。
Thank you all for the answers, esspecially to Arkku. That helped a lot. I fixed it and now it works fine. I added "i = i - 1" at the last condition, after "else if (ap == 0 && bp == 0)" in order to mantain the iteration on the same position.
这就是我所做的：
for (i2 = 0; i2 < n; i2++) {
if (ap > 0) {
Password1[i2] = encryptedPass5[i2] - longKey2[i2];
ap--;
}
else if (bp > 0) {
Password1[i2] = longKey2[i2] - encryptedPass5[i2];
bp--;
}
else if (ap == 0 && bp == 0) {
ap = a;
bp = b;
i = i - 1;
}
这解决了问题。
与其他函数相同：
for (i = 0; i < n; i++) {
if (ap > 0) {
encryptedPass[i] = longKey1[i] + password4[i];
ap--;
}
else if (bp > 0) {
encryptedPass[i] = longKey1[i] - password4[i];
bp--;
}
else if (ap == 0 && bp == 0) {
ap = a;
bp = b;
i = i - 1;
}
当我加密时不再有 -858993460，也不再有╠╠╠
No more "-858993460" when I encrypt and no more "╠╠╠╠╠╠╠╠" when I printf the password in the reverse process.
再次感谢大家，对于原消息的长度，我们深表歉意。
下次我将考虑到这一点。
Thank you all again, and sorry for the lenght of the original message. Next time I shall take that into account.
cd
这篇关于printf在屏幕上显示“ -858993460”。或“╠╠╠╠╠╠╠╠”；这些是什么？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
