小程序 || 語句

Program 1:

程序1：

#include <iostream> #include <stdio.h> using namespace std;int main() {int num = 0;num = printf("%d ", printf("%d ", printf("ABC")));if (num == 2) {cout << "INDIA";}else if (num == 3) {cout << "AUSTRALIA";}else {cout << "CHINA";}return 0; }

Output:

輸出：

ABC3 2 INDIA

Explanation:

說明：

The above program will print "ABC3 2 INDIA" on the console screen.

上面的程序將在控制臺屏幕上打印“ ABC3 2 INDIA” 。

The printf() function returns the total number of characters printed on the console screen.

printf()函數返回控制臺屏幕上打印的字符總數。

Execution of the program step by step:

逐步執行程序：

num = printf("%d ",printf("%d ",printf("ABC")));

In this statement the innermost printf() will be executed first and prints "ABC" and returns 3, then the second printf() prints "3 " and returns 2 because 3 and space are two characters, and then the last outermost printf() will be executed and prints "2 " and returns 2 that is assigned to num variable.

在此語句中，最里面的printf()將首先執行并打印“ ABC”并返回3 ，然后第二個printf()打印“ 3”并返回2，因為3和空格是兩個字符，然后是最后一個最外面的printf()將被執行并輸出“2”，并返回2分配給num變量。

The num variable contains 2 then the first condition will be true and it will print "INDIA".

num變量包含2，那么第一個條件為true，它將輸出“ INDIA” 。

Then the final output will be?"ABC3 2 INDIA".

然后，最終輸出將為“ ABC3 2 INDIA” 。

Program 2:

程式2：

#include <iostream> #include <stdio.h> using namespace std;int main() {int num = 0;if (EOF) {cout << "INDIA";}else if (NULL) {cout << "AUSTRALIA";}else {cout << "USA";}return 0; }

Output:

輸出：

INDIA

Explanation:

說明：

The above program will print "INDIA" on the console screen. Because the value of the EOF macro is -1. And any non-zero value is considered as a true for if conditions, this, the first condition will be true and it will print "INDIA" on the console screen.

上面的程序將在控制臺屏幕上打印“ INDIA” 。 因為EOF宏的值為-1 。 如果條件為條件，則任何非零值都將被視為true，則第一個條件將為true，并將在控制臺屏幕上顯示“ INDIA” 。

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翻譯自: https://www.includehelp.com/cpp-tutorial/conditional-statements-find-output-programs-set-2.aspx

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