为什么我的程序没有从文件文件中读取？ [英] Why is my programme not reading from the textfile?

问题描述

大家好，我的程序似乎没有从text文件raw.txt中读取，我将它放在与.exe文件相同的目录中。有谁知道为什么？我以前使用过这个功能，它在另一个程序中工作。但现在当我在数组a []中打印出什么内容时，我得到的只是零和垃圾值。请帮助我！我很绝望！



i收到调试错误，运行时检查失败＃@ - 堆栈aorund变量'time'已损坏。

Hi everyone, my program doesnt seem to be reading from the textfile raw.txt which i placed in the same directory as the .exe file. Does anyone know why? i have used this function before and it worked in another program. but now when i printf whats in the array a[], all i get is zeros and rubbish values. Pls help me! im desperate!

i got a debug error, run-time check failure #@ - stack aorund the variable 'time' was corrupted.

int main()
{
int channel, maxdatapoints ,size1=0 ,i=0 ,k=0 ,j=0 , totalsize=0 ;
int time;
int ans,f, maxf=0 ,maxf2=0 ,maxans2=0 ,maxans=0 ;
double *a,*temp ,*diff,x;
FILE *fread, *histogramw, *histogramr,*result;
        int  frequency=0; /*initialise the frequency of a variable, and the variable x*/


    printf("Enter the maximum number of data points to compute \n");
    scanf("%d", &maxdatapoints);


    a=(double *)calloc(maxdatapoints,sizeof(double));

        if ((fread = fopen("raw.txt", "r")) == NULL)
        {
            printf("Cannot open %s\n", "raw.txt");
            exit(EXIT_FAILURE);
        }



            while (!feof(fread) && i<maxdatapoints)
            { /*Read the output file*/
                fscanf(fread, "%lf %*c %d\n", &time, &channel);

                /*If channel 1, write that to channel1.txt*/
                if(channel==1)
                {
                    a[i]=time;

                size1=size1+1;
                    i=i+1;

                printf("%lf \n", a[i]);

                }
            }

    fclose(fread);

推荐答案

您在 i a [i] >已增加。因此，您要打印到目前为止尚未分配的元素。将增量操作移到 printf 语句后面：

You are printing a[i] after i has been incremented. So you are printing an element which has not been assigned so far. Move the increment operation behind the printf statement:

// i=i+1;
printf("%lf \n", a[i]);
i++;

还有另一个错误：变量 time 声明为 int 但传递给 fscanf（）以存储 double 会导致堆栈损坏。

There is another error: The variable time is declared as int but passed to fscanf() to store a double which results in a stack corruption.

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