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水不水,一看就知道,不过得注意题中的感叹号(很阴)贴个代码作参考:#include"stdio.h"
#include"string.h"
int main()
{
int n,num=0;
scanf("%d",&n);
while(n--)
{
char a[10];
int sum=0,p;
int i,j;
scanf("%s",&a);
num++;
for(i=1;i<=strlen(a);i++)
{
if(a[strlen(a)-i]=='?')
{j=i;continue;}
if(i%3==1)
sum+=(a[strlen(a)-i]-'0')*9;
else if(i%3==2)
sum+=(a[strlen(a)-i]-'0')*3;
else if(i%3==0)
sum+=(a[strlen(a)-i]-'0')*7;
}
p=sum;
for(i=0;i<=9;i++)
{
sum=p;
if(j%3==1)
{
sum+=9*i;
if(sum%10==0)
break;
}
else if(j%3==2)
{
sum+=3*i;
if(sum%10==0)
break;
}
else if(j%3==0)
{
sum+=7*i;
if(sum%10==0)
break;
}
}
a[strlen(a)-j]=i+'0';
printf("Scenario #%d:\n",num);
printf("%s\n\n",a);
}
return 0;
}
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