關於幾道Linux C程序設計題

for:

int i = 1, sum = 0;

for(i = 1; i < 101; i++)

{

sum += i;

}

printf("sum=%d\n", sum);

while:

int i = 1, sum = 0;

while(i != 101)

{

sum += i++;

}

printf("sum = %d\n", sum);

20.

#!/bin/bash

sudo ls /root

mkdir abc

cd abc

touch k.c

chmod +x k.c

21.

float a, b, arv;

scanf("%f %f", &a, &b);

arv = (a + b) / 2;

printf("%.2f\n", arv);