C Exercises: Show the first of calendar time

C Date Time: Exercise-9 with Solution

Write a program in C to show the first of calendar time.

Sample Solution:

C Code:

#include <stdio.h>
#include <time.h>
int main(void)
    struct tm first = {.tm_mday=1};
    printf("\n%s\n", asctime(&first));

Sample Output:

Sun Jan 01 00:00:00 1900


Flowchart: Show the first of calendar time

C Programming Code Editor:

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C Programming: Tips of the Day

What does (x ^ 0x1) != 0 mean?

The XOR operation (x ^ 0x1) inverts bit 0. So the expression effectively means: if bit 0 of x is 0, or any other bit of x is 1, then the expression is true.

Conversely the expression is false if x == 1.

So the test is the same as:

if (x != 1)

and is therefore (arguably) unnecessarily obfuscated.

Ref :https://bit.ly/2NIisQM

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