/*-------------------------------------------------------1.【程序功能】编程计算:s=1+2+3+……+n (n由键盘输入)-------------------------------------------------------*//***********SPACE***********/#【1】main(){/***********SPACE***********/【2】i,n,sum;sum=0;printf("请输入一个正整数n:");/***********SPACE***********/scanf("%d",【3】);/***********SPACE***********/for(i=1;i<=n;【4】){/***********SPACE***********/sum=【5】;}printf("1+2+...+%d =%d\n",n,sum);}