将结构成员输入到 printf 函数和参数过多错误

Question

Hi can anybody tell me the issue of what's going on in the printf function? I keep getting an error of

warning: format '%i' expects argument of type 'int', but argument 2 has type 'char *' [-Wformat=] time2.hour, time2.min, time2.sec, time3.hour, time3.min, time3.sec);

and then

warning: too many arguments for format [-Wformat-extra-args]

Anybody give some pointers as to how to fix? Thanks

#include <stdio.h>

struct time
{
    int hour;
    int min;
    int sec;
};

int main (void)
{
    struct time time1, time2, time3;
    struct time elapsed_time (struct time time1, struct time time2);

    printf("Enter your first time (hh:mm:ss) : ");
    scanf ("%i:%i:%i", &time1.hour, &time1.min, &time1.sec);

    printf("Enter your second time (hh:mm:ss) : ");
    scanf ("%i:%i:%i", &time2.hour, &time2.min, &time2.sec);

    time3 = elapsed_time(time1,time2);

    printf("The time difference between %.2i:%.2i:%.2i & %.2i:%.2i:%.2i",
            "is %.2i:%.2i:%.2i.\n", time1.hour, time1.min, time1.sec,
            time2.hour, time2.min, time2.sec, time3.hour, time3.min, time3.sec);

    return 0;
}

struct time elapsed_time (struct time time1, struct time time2)
{
    struct time time3 = { 0, 0, 0 };

    time3.hour = time2.hour - time1.hour;
    time3.min = time2.min - time1.min;
    time3.sec = time2.sec - time1.sec;

    return time3;
} 

Answer 1

It looks like you have two string literals in your long printf statement, but the printf statement only allows one string at the beginning, and it must be the one that contains all the %.2i format placeholders.

Right now, printf gets the first one, and then tries to use the second string as an input argument to the first.

Join those two strings into 1 string, and it should work.