有个return和getchar（）的问题
#include <stdio.h>main(){ int i,j,n; long sum=0,temp=0; printf("Please input a number to n:\n"); scanf("%d",&n); if(n<1) { printf("The n must no less than 1!\n"); return; } for(i=1;i<=n;i++) { temp=0; for(j=1;j<=i;j++) temp+=j; sum+=temp; } printf("The sum of the sequence(%d) is %d\n",n,sum); getchar(); getchar();}