程設練習1-7

//假設使用者友善不會輸入0。
#include<stdio.h>
#include<stdlib.h>
int main(void){
    int total=1,temp=1,num,count=0;
    scanf("%d",&num);
    do
    {
     num-=temp;
     temp+=3;
     count++;
    }while(num>=temp);
    printf("  m = %d\nsum = 1",count);
     for(int i=4;i<=temp-3;i+=3)
     {
      if(num==0&&i==-2+3*count)
      break;
      printf("+%d",i);
      total+=i;
     }
    printf(" = %d\n",total);
    system("PAUSE");
}