Question

杭电2024题我的程序为何总是Wrong Answer？

#include <stdio.h>
#include <string.h>
int main()
{
int n,i,j,m,a[100];
char str[50];
char *keyword[]={"auto", "break", "case", "char", "const", "continue", "default",
"do", "double", "else", "enum", "extern", "float", "for", "goto",
"if", "int", "long", "register", "return", "short", "signed",
"sizeof", "static", "struct", "switch", "typedef", "union", "unsigned",
"void", "volatile", "while"};
while(scanf("%d",&n)!=EOF&&n<=100)
{
getchar();
for(i=0;i<n;i++)
{
gets(str);
if((*(str+0)>='a'&&*(str+0)<='z')||(*(str+0)>='A'&&*(str+0)<='Z')||*(str+0)=='_')
{
m=0;
for(j=0;*(str+j)!='\0';j++)
{
if(*(str+j)==' ')
{
a[i]=0;m=1;
break;
}
}
if(m==0) a[i]=1;
}
else a[i]=0;
for(j=0;j<32;j++)
{
if(strcmp(keyword[j],str)==0)
a[i]=0;
}
}
for(i=0;i<n;i++)
{
if(a[i]==0) printf("no\n");
if(a[i]==1) printf("yes\n");
}
}
return 0;
}
帮忙请用C语言解释一下。

Answer 1

#include <iostream>
using namespace std;

bool ischar(char ch)
{
return ch>='数弯谈a'&&ch<薯碰='z' || ch>='A'&&ch<='Z';
}

bool isnum(char ch)
{
return ch>='0'&&ch<='9';
}
bool judge(char *a)
{
if(a[0]!='_'&&!ischar(a[0])) return false;
for(int i=1; a[i]; ++i)
if(a[i]!='_'&&!ischar(a[i])&&!isnum(a[i])) return false;
return true;
}
int main()
{
char a[100];
int text, i, j;
cin>>text;
getchar();
for(i=1; i<=text; ++i)
{
cin.getline(a, 100);
if(judge(a)) cout<闹雹<"yes\n";
else cout<<"no\n";
}
return 0;
}