Update contents of file to the upper case

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One of your colleagues did a huge mistake while storing the names of the employees into a file named "names.txt" that he was handling by storing all the names in lower case. But the requirement is to generate a report where all the names are in caps.

Write a c program to update the lower case characters in file to upper case

Let's consider

Names are stored in file like shown below

hari

jegan

sudhan

anil

yasika

Updated Names in File

HARI

JEGAN

SUDHAN

ANIL

YASIKA

What I have tried:

C

<pre>#include<stdio.h>
#include<string.h>


void main()
{
 
   FILE *fp;
   int i;
   char str[5][10],msg[10],n;
   
   fp=fopen("names.txt","r");
   //fp=fopen("names.txt","w");
  for(i=0;i<5;i++)
   {
       //fgets(str[i],4,fp);
       fscanf(fp,"%s",str[i]);
    //  strcpy(msg,strupr(str[i]));
    int fgetc(FILE *fp);
        // puts(msg);
   }
  
   fclose(fp);

}

Posted 27-Sep-17 7:25am

ayushi sharma

Updated 27-Sep-17 8:06am

Dave Kreskowiak

v2

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OriginalGriff · Answer 1 · 2017-09-27T08:06:00

0) Create a char array inputString to hold the lines as you read them, and a char* pointer outputString to hold the pointer to the uppercased version.
1) Open the input file.
2) Open the output file.
3) Loop until the input is finished.
3.1) Inside the loop, read a line from the input.
3.2) Use strupr to convert the string to uppercase:

C++

outputString = strupr(inputString);

3.3) Write the the output to the output file.
4) After the loop, close both files.

But this is your homework, so that's all the code you will get!