几道C++，C语言题目

Question

如题所述

Answer 1

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#include
int main()
{
int i,j,min,max,sum;
scanf("%d",&j);
for(i=1;i<=j;i++)
{
scanf("%d %d",&min,&max);
sum=(min+max)*(max-min+1)/2;
printf("case %d:sum=%d\n",i,sum);

}
return 0;
}

Answer 2

发给我看看