1.輸入一組數,輸出其中有多少個負數。
程序代碼如下:
#include <iostream>
int main()
{
int sum = 0, value;
std::cout << "Please input your numbers [End with CRTL+D] :" << std::endl;
while (std::cin >> value) {
if (value < 0) {
sum++;
}
}
std::cout << "There is " << sum << " negative numbers ." << std::endl;
return 0;
}
2. 提示用戶輸入兩個數,並將這兩個數之間的每個數輸出。
程序代碼如下:
#include <iostream>
int main()
{
int v1, v2;
std::cout << "Please input v1 and v2 : " << std::endl;
std::cin >> v1 >> v2 ;
std::cout << "The number between the " << v1 << " and " << v2 << std::endl;
int lower, upper;
if (v1 <=v2) {
lower = v1;
upper = v2;
} else {
lower = v2;
upper = v1;
}
int value = lower;
while (value < upper-1) {
++value;
std::cout << value << " ";
}
return 0;
}
3.輸入兩個數,再求兩個數之間的數之和
程序代碼如下:
#include <iostream>
int main()
{
int v1, v2;
std::cout << "Please input v1 and v2 :" << std::endl;
std::cin >> v1 >> v2;
int upper, lower;
if ( v1 <= v2) {
upper = v2;
lower = v1;
} else {
upper = v1;
lower = v2;
}
int sum = 0;
for (int i = lower+1; i <= upper-1; i++) {
sum +=i;
}
std::cout << "The sum of the numbers between " << v1 << " and " << v2 << " is " << sum <<std::endl;
return 0;
}