第一次scanf新手C編程后崩潰

Question

我的代碼（ 要點鏈接 ）

//pre-processor directives
#include <stdio.h>
#include <math.h>

//Main function
int main() {
    int month, day, year, lowest_temp, highest_temp;
    float temp;
    char fname[30];

    FILE * ifp;

    printf("Tell me about your dragon's preferred temperature for flying: What is the coldest temperature they can fly in?\n");
    scanf("%d", lowest_temp);
    printf("What is the hottest temperature they can fly in?\n");
    scanf("%d", highest_temp);
    printf("Please enter the name of the weather data file for Dragon Island.\n");
    scanf("%s", fname);

    ifp = fopen(fname, "r");
    fscanf(ifp, "%d %d %d %f, &month &day &year &temp");

    printf("%d %d %d %f, &month &day &year &temp");

    return 0;

}

第一次掃描后崩潰沒有錯誤

如果您能告訴我錯誤是什么，我將不勝感激。 另外，如果您可以幫助我解決問題的后續步驟，那也很棒。

我的作業https://gist.github.com/anonymous/e9292f14b2f8f71501ea/88e9e980632871f1f1dedf7589bb518f1bba43e8

Answer 1

 scanf("%d", lowest_temp); 
 ...
 scanf("%d", highest_temp); 

%d要求將int參數的地址傳遞給它，而它只是int變量。 通過他們的地址-

scanf("%d",&lowest_temp); 
...
scanf("%d",&highest_temp); 

這兩個陳述-

fscanf(ifp, "%d %d %d %f, &month &day &year &temp");
printf("%d %d %d %f, &month &day &year &temp");   

應該-

fscanf(ifp, "%d %d %d %f", &month &day &year &temp);
printf("%d %d %d %f", month ,day,year ,temp);