Question

我希望它看起来像“自上次打开文件以来已经过了00小时00分43秒。” 我怎么能这样做，所以数字仍然是整数，而不是浮点数？

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

int main(){
    int result,h,m,currentTime,previousTime;
    FILE *fp;

    currentTime=time(NULL);
    result=currentTime-previousTime;
    h=(result/3600);
    m=(result/60);


    fp=fopen("aeg.txt","r");

    if(fp==NULL){
        printf("No such file exists\n");
    }else{
        fscanf(fp,"%d",&previousTime);
        printf("It's been %d hours, %d minutes and %d seconds since you last opened the file",h,m,result);
        fclose(fp);
    }

        fp=fopen("aeg.txt","w");
        fprintf(fp,"%d",currentTime);
        fclose(fp);

    return 0;
}

Answer 1

您的previousTime变量未初始化会导致result错误。

更改程序中语句的顺序就足以解决这个问题。

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

int main(){
    int result,h,m,currentTime,previousTime;
    FILE *fp;

    fp=fopen("aeg.txt","r");

    if(fp==NULL){
        printf("No such file exists\n");
    }else{
        fscanf(fp,"%d",&previousTime);
        fclose(fp);
    }

    currentTime=time(NULL);
    result=currentTime-previousTime;
    h=(result/3600);
    m=(result/60);

    printf("It's been %d hours, %d minutes and %d seconds since you last opened the file",h,m,result);
    fp=fopen("aeg.txt","w");
    fprintf(fp,"%d",currentTime);
    fclose(fp);

    return 0;
}

您对浮点值的提问尚不清楚，因为您的程序中没有float个变量，只有int。

如何将上次打开文件后经过的秒数转换为小时，分钟和秒？

1 个答案: