int sum=0,a[100],i,j;printf("請輸入100個整數：\n");for(i=0;i<100;i++){ scanf("%d",&a[i]);sum+=a[i];}j=0;printf("大於等於0的數有：\n");for(i=0;i<100;i++) if(a[i]>=0){printf("%d\t",a[i]);if(j++>5){j=0;printf("\n");}}printf("平均數為：%.2f\n",(float)sum/100);}