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我正在爲cs50做pset,並且無論我做什麼,都會顯示分段錯誤。顯示分段錯誤(核心轉儲)vigenere密碼
我試過各種東西,但它一直顯示同樣的事情。
這是我試圖實現的vigenere密碼的代碼。
#include <stdio.h>
#include <cs50.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
int main(int argc,string argv[]){
if(argc == 2){
//check if text
if(isalpha(argv[1])){
//key
string num = argv[1];
int num_length = strlen(num);
//convert key to lower for easier stuff,dont want to repeat for higher too
for(int i = 0;i < num_length;i++){
if(isupper(num[i])){
num[i]= tolower(num[i]);
}
}
//ask for name
printf("Line to be encoded please :- \n");
string name = GetString();
//main stuff
for(int i=0,n = strlen(name);i < n;i++){
if(isupper(name[i])){
//key part
int keyu = (num[i] - 97) % num_length;
//converting to alphabetical index
int alpha_name_upper = name[i] - 65;
//encoding
int encoded_upper = (alpha_name_upper + keyu) % 26;
//converting back to ascii index
name[i] = encoded_upper + 65;
}
if(islower(name[i])){
int keyl = (num[i] - 97) % num_length;
int alpha_name = name[i] - 97;
int encoded_lower = (alpha_name + keyl) % 26;
name[i] = encoded_lower + 97;
}
}
printf("Encoded line :- %s \n",name);
}
}else{
return 1;
}
}
是的,你是對的,一旦我刪除了這行代碼,它編譯。無論如何謝謝。 – Jedi18