Question

How to get yesterday date in C

Answer 1

#include <stdio.h>
#include <time.h>

int main() {
    time_t now = time(NULL);

    struct tm* tm = localtime(&now);
    tm->tm_mday--;
    mktime(tm); 

    char yesterday[32] = "";
    strftime(yesterday, sizeof(yesterday), "%Y-%m-%d", tm);

    puts(yesterday);

    return 0;
}




/*
run:

2023-08-10

*/

 

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