C. 身份证号码最后一位

#include <stdio.h>
void zi()
{
	char a[18];
	int z;
	scanf("%s",a);
	z=(a[0]-'0')*7+(a[1]-'0')*9+(a[2]-'0')*10+(a[3]-'0')*5+(a[4]-'0')*8+(a[5]-'0')*4+(a[6]-'0')*2+(a[7]-'0')*1+(a[8]-'0')*6+(a[9]-'0')*3+(a[10]-'0')*7+(a[11]-'0')*9+(a[12]-'0')*10+(a[13]-'0')*5+(a[14]-'0')*8+(a[15]-'0')*4+(a[16]-'0')*2;
	int x;
	x=z%11;
	int c;
	if(x== 0) c=1;
	else if(x==1)    c=0;
	else if(x==2)    c=40;
	else if(x==3)    c=9;
	else if(x==4)    c=8;
	else if(x==5)    c=7;
	else if(x==6)    c=6;
	else if(x==7)    c=5;
	else if(x==8)    c=4;
	else if(x==9)    c=3;
	else if(x==10)   c=2;
	if(c==a[17]-'0')
	printf("right\n");
	else
	printf("wrong\n");
}
int main(void)
{
	int a;
	scanf("%d",&a);
	for(;a>0;a--)
	{
		zi();
	}
	return 0;
}

亲测可过