Databases
StackOverflow2013
Postsdbo
POstring from file C
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POstring from file C
    primarykey
    data
    text
    <p>I'm reading a string from a file and then, trying to add zeros to the string till it reach 100, and then I'm printing the string, but I don't know what's wrong, I've tried more than one approach , but they all seems not to work. </p> <pre><code>int main(int argc, char *argv[]) { if (argc != 2 ){ fprintf(stderr, "usage: server filename \n"); exit(1); } FILE *file = fopen(argv[1], "r"); if (file==0) { printf("file couldn't be opened\n"); exit(1); } int i; char str1[100]; //char str2[100]; //memset(str2,0,sizeof(str2)); //for(i = 0; i &lt; 100; i++) // fprintf(stdout, "str2[%u]: %u\n",i,str2[i]); while (fscanf(file, "%s", str1) != EOF) { for(i=13 ; i &lt; 100; i++) str1[i]=0; } for(i = 0; i &lt; 100; i++) fprintf(stdout, "str1[%u]: %u\n",i,str1[i]); return 0; } </code></pre> <p>but I print it I got </p> <pre><code>str1[0]: 119 str1[1]: 111 str1[2]: 114 str1[3]: 108 str1[4]: 100 str1[5]: 0 str1[6]: 0 str1[7]: 0 up till 99 </code></pre> <p>I don't understand this although there is a string in the file "hello" and then I've tried this</p> <pre><code>int main(int argc, char *argv[]) { if (argc != 2 ){ fprintf(stderr, "usage: server filename \n"); exit(1); } FILE *file = fopen(argv[1], "r"); if (file==0) { printf("file couldn't be opened\n"); exit(1); } int i; char str1[12]; char str2[100]; memset(str2,0,sizeof(str2)); //for(i = 0; i &lt; 100; i++) // fprintf(stdout, "str2[%u]: %u\n",i,str2[i]); while (fscanf(file, "%s", str1) != EOF) { strcpy(str2,str1); } for(i = 0; i &lt; 100; i++) fprintf(stdout, "str2[%u]: %u\n",i,str2[i]); return 0; } </code></pre> <p>and I gave me the exact same result as the first one, so I don't understand what is happening here, and why I'm getting these results. I'll be grateful if you can explain what I'm doing wrong here. Thanks in advance.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USuser1653150
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POstring from file C
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POstring from file C
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat are you expecting to get?
      singulars
      1. POstring from file C
      1. USVaughn Cato
    2. COI'm trying to get hello0000000000---till 99 but now it is either printing the zeros and the ascii or printing hello without zeros, is there no way to get them both??
      singulars
      1. POstring from file C
      1. USuser1653150
    3. COI think your main confusion is between the number zero and the character zero. Use '0' (in single quotes) if you want the character zero.
      singulars
      1. POstring from file C
      1. USVaughn Cato
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload