C++-hdu1000,1001,1002-格式是真的坑

1 #include <cstdio>
2 int main(){
3     for(int a,b;~scanf("%d%d",&a,&b);printf("%d\n",a+b));
4     return 0;
5 }

1 #include <cstdio>
2 int main(){
3     for(int n;scanf("%d",&n)!=EOF;printf("%d\n\n",(n%2==0?((n/2)*(1+n)):((1+n)/2)*n)));
4     return 0;
5 }

 1 #include <cmath>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <algorithm>
 5 using namespace std;
 6 int main() {
 7     char s1[1000],s2[1000],s3[1001];
 8     int num1[1000],num2[1000],num3[1001],t,T;
 9     for(scanf("%d",&T),t=1; t<=T; t++) {
10         scanf("%s%s",s1,s2);
11         memset(num1,0,sizeof(num1));
12         memset(num2,0,sizeof(num2));
13         memset(num3,0,sizeof(num3));
14         memset(s3,0,sizeof(s3));
15         int len1=strlen(s1),len2=strlen(s2),len3=max(len1,len2);
16         for(int i=len1-1,cnt=0;i>=0;num1[cnt++]=s1[i]-‘0‘,i--);
17         for(int i=len2-1,cnt=0;i>=0;num2[cnt++]=s2[i]-‘0‘,i--);
18         for(int i=0;i<len3;i++)num3[i]=num1[i]+num2[i];
19         for(int i=0;i<len3;i++)if(num3[i]>9)num3[i+1]++,num3[i]%=10;
20         if(num3[len3])len3++;
21         for(int i=len3-1,cnt=0; i>=0; i--) s3[cnt++]=num3[i]+‘0‘;
22         printf("Case %d:\n%s + %s = %s\n",t,s1,s2,s3);
23         if(t!=T)printf("\n");
24     }
25     return 0;
26 }