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水好深啊!我摸不着头脑了!附代码!#include <stdio.h>
#include <string.h>
int main()
{
char str1[20],str2[20];
int i,j,length1,length2,total;
scanf("%s %s",str1,str2);
length1=strlen(str1);
length2=strlen(str2);
total=0;
for(i=0;i<length1;i++)
{
for(j=0;j<length2;j++)
total+=(str1[i]-'0')*(str2[j]-'0');
}
printf("%d\n",total);
return 1;
}
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