我有一个作业，我应该为我的计算机科学 MOOC CS50 上交。在其中我必须通过哈佛网站上交作业，但是当它显示“警告：隐式声明......”时它不会接受我的代码
有没有办法关闭它？
我有两个正在使用的函数islower()， 和isupper()，它们是导致挂断的原因。
我的代码似乎工作得很好，它编译和一切。顺便说一句，如果有人想告诉我我的代码有多糟糕，那将不胜感激。我在网上上课并没有收到很多（或任何）批评。
#include <stdio.h>
#include "cs50.h"
#include <stdio.h>
#include <string.h>
int main(int argc, string argv[])
{
int salt, cipherNum;
char cipher[40];
char letter;
//// Greeting
printf("Please enter the text to ceez...\n");
//// grab text
string txxt = GetString();
if (argc == 2) // must have command line argument
{
salt = atoi(argv[1]) % 26;
//printf("Salt: %d\n", salt);
}
else // yell at user if command line arg is not there
{
printf("Not cool! I need something to caesariphy...\n");
return 1;
}
//~
// This will iterate over each letter in the text
for (int i = 0, n = strlen(txxt); i < n; i++)
{
// int letter = 'A'; i.e. 65
// Must Preserve Case
//~ printf("%c---\n", txxt[i]);
//if lower start from 'a'or 97
if ( islower(txxt[i]) )
{
//~ printf("islower\n");
letter = txxt[i];
cipherNum = txxt[i];
//~ printf("%c is the letter\n", letter + salt);
//~ printf("%d is the cipherNumz\n", cipherNum);
if ((letter + salt) > 122)
{
//~ printf("letter + salt is > 90: %d \n", letter+salt);
cipherNum = (96 + (cipherNum + salt) % 122);
//~ printf("%c is the letters", cipherNum);
}
else
{
cipherNum = letter + salt;
}
cipher[i] = cipherNum ;
}
else if ( isupper(txxt[i]))
{
letter = txxt[i];
cipherNum = txxt[i];
//printf("%c is the letter\n", letter + salt);
//printf("%d is the cipherNumz\n", cipherNum);
if ((letter + salt) > 90)
{
//printf("letter + salt is > 90: %d \n", letter+salt);
cipherNum = (64 + (cipherNum + salt) % 90);
//printf("%c is the letters", cipherNum);
}
else
{
cipherNum = letter + salt;
}
//printf("%c\n", cipherNum);
cipher[i] = cipherNum ;
//printf("testing12\n");
}
else
{
cipher[i] = txxt[i];
}
//~
}
cipher[strlen(txxt) + 1] = '\0';
printf("%s\n", cipher);
return 0;
}