c语言s = 1+(1+2)+(1+2+3)+...+(1+2+3+...+N)值,先写一个1+2+的计算...+.
# include & ltstdio.h & gt
整数求和
{
int sum = 0;
for(int I = 1;我& lt= n;i++)
sum = sum+I;
返回总和;
}
int main()
{
int sum,n;
sum = 0;
Printf("请输入n:\ n ");
scanf("%d ",& ampn);
for(int I = 1;我& lt= n;i++)
sum = sum+sumn(I);
printf("%d ",sum);
}