因此，我编写了一个Cesar加密程序，该加密程序用数字将“空格”字符的位置保存在加密文件的第二行中（例如：
HMEQSRHLMIV //加密文本（通常在此处输入）
7 //空格字符所在的数字
）
我现在的问题是，当我用fgets()读取字符串时，它只能读取到\ n，所以如何获取文件的第二行？
这是我的代码，如果有帮助的话。
#include <stdio.h>
#include <stdbool.h>
#define asize 80
void deleteEnter(char[]);
void decrypt(char[], int, char[]);
int main() {
char Message[asize] = {0};
int code = 0;
char encMessageFile[asize + 4] = {};
char encMessage[asize] = {};
char MessageFile[asize] = {};
FILE *fp;
FILE *fp2;
bool open = false;
printf("Gib die verschluesselte Datei an: \t");
fgets(encMessageFile,asize + 4, stdin);
deleteEnter(encMessageFile);
fp = fopen(encMessageFile, "r");
do {
if (fp == NULL) {
printf("\nEs wurde keine Datei gefunden die so heisst\n");
open = false;
fclose(fp);
} else {
open = true;
}
} while (open == false);
fgets(encMessage,asize,fp);
printf("\nGib den Code zum entschluesseln ein: \t");
scanf("%i", &code);
decrypt(encMessage, code, Message);
for (int i = 0; i < asize + 4; ++i) {
if (encMessageFile[i] == '.' && encMessageFile[i + 1] == 'e' && encMessageFile[i + 2] == 'n' && encMessageFile[i + 3] == 'c' && encMessageFile[i + 4] == '\0') {
for (int j = 0; j < i; j++) {
if (encMessageFile[j] != '\0') {
MessageFile[j] = encMessageFile[j];
MessageFile[j + 1] = '\0';
}
}
i = asize + 4;
}
}
fp2 = fopen(MessageFile, "w");
fputs(Message, fp2);
fclose(fp2);
fclose(fp);
remove(encMessageFile);
}
void deleteEnter(char encMessage[]){
for (int i = 0; i < asize; i++) {
if (encMessage[i] == '\0') {
i = asize;
} else if (encMessage[i] == '\n'){
encMessage[i] = '\0';
i = asize;
}
}
}
void decrypt(char encMessage[], int code, char Message[]) {
int a = code % 26;
int LeerPos[asize] = {0};
for (int k = 0; k < asize; k++) {
if (encMessage[k] == '\n'){
for (int i = 0; i < asize; ++i) {
if (encMessage[k + i] != '\0') {
LeerPos[i] = encMessage[k + i] - 80;
} else {
i = asize;
}
}
encMessage[k] = '\0';
}
}
for (int i = 0; i < asize; i++) {
if (encMessage[i] == '\0') {
i = asize;
} else {
for (int j = 0; j < a; j++) {
encMessage[i] = encMessage[i] - 1;
if (encMessage[i] < 'A' && encMessage[i] > 'A' - 2) {
encMessage[i] = 'Z';
}
}
}
}
int x = 0;
for (int l = 0; l < asize; l++) {
for (int i = 0; i < asize; i++) {
if (l == LeerPos[i]) {
Message[l] = ' ';
x++;
} else {
Message[l] = encMessage[l - x];
}
}
}
}
我希望解密消息后的程序是“ DIAMOND HIER”
因为我也发布了加密的用户旺旺，所以它是：
#include <stdio.h>
#include <stdbool.h>
#define asize 80
void cleanup (char[],char[], int[]);//2 arrays input und endinput
void deleteEnter(char[]);
void toupper(char[]); //endinput
int laenge(char[]); //input pointeranzleer
void encrypt(char[], int);
void Ausgabe(char[], char[], int[]);
//i abspeichern. for schleife in dritte array und array+1 und i++
int main() {
FILE *fp;
int schluessel=0;
char input[asize]={' '};
char endinput[asize]={' '};
char name[asize] = {' '};
bool open = false;
int LeerPos[80] = {0};
do {
printf("Bitte geben Sie den Namen der Datei ein:");
fgets(name, asize, stdin);
deleteEnter(name);
fp = fopen(name, "r");
if (fp == NULL) {
printf("\nEs wurde keine Datei gefunden die so heisst\n");
open = false;
fclose(fp);
} else {
open = true;
}
} while (open == false);
fgets(input, asize, fp);
printf("Bitte geben sie den Schluessel ein:");
scanf("%d",&schluessel);
cleanup(input,endinput, LeerPos);
toupper(endinput);
encrypt(endinput, schluessel);
Ausgabe(endinput, name, LeerPos);
fclose(fp);
return 0;
}
int laenge(char input[asize]){
int i=0;
while(input[i]!='\0'){
i++;
}
return i;
}
void cleanup(char input[asize],char endinput[asize], int LeerPos[]){
int j=0;
int LC = 0;
int lengthIn = laenge(input);
for(int i=0;i<lengthIn;i++){
if(input[i]!=' '){
endinput[j]=input[i];
j++;
} else {
LeerPos[LC] = i;
LC++;
}
}
}
void toupper(char endinput[asize]){
for(int i=0;i<laenge(endinput);i++){
if(endinput[i]>='a'&&endinput[i]<='z'){
endinput[i]=endinput[i]-('z'-'Z');
}
}
}
void encrypt(char S[asize], int code) {
int a = code % 26;
for (int i = 0; i < 80; i++) {
if (S[i] == '\0') {
i = 80;
} else {
for (int j = 0; j < a; j++) {
S[i] = S[i]+1;
if (S[i] == 'Z' + 1) {
S[i] = 'A';
}
}
}
}
}
void Ausgabe(char S[asize], char name[asize], int LeerPos[]) {
FILE *fpOut;
char EName[asize + 4];
char EncEnd[4] = {'.','e','n','c'};
for (int j = 0; j < asize; j++) {
EName[j] = name[j];
}
for (int k = 0; k < asize + 4; k++) {
if (EName[k] == '\0'){
for (int i = k; i < k + 4; ++i) {
EName[i] = EncEnd[i - k];
}
k = asize+4;
}
}
fpOut = fopen(EName, "w");
printf("\nVerschluesselte File: %s", EName);
for (int i = 0; i < asize; i++) {
if (S[i] == '\0') {
i = asize;
}else {
fprintf(fpOut, "%c", S[i]);
}
}
fprintf(fpOut, "%c", '\n');
for (int l = 0; l < asize; l++) {
if (LeerPos[l] != '\0'){
fprintf(fpOut, "%i", LeerPos[l]);
} else {
l = asize;
}
}
remove(name);
fclose(fpOut);
}
void deleteEnter(char S[]) {
for (int i = 0; i < asize ; i++) {
if (S[i] == '\0') {
i = asize;
} else if (S[i] == '\n') {
S[i] = '\0';
}
}
}
感谢所有帮助。 Arigatou Gozaimasu