Write a program in ANSI C that counts the number of times th

Write a program in ANSI C that counts the number of times the characters \'a\' through \'z\' (lower case and upper case) occur in a text file. Use getchar() for input, and use input redirection for connecting the input file to the program.

Solution

#include <stdio.h>

int main()
{
FILE *fp;
char file[100];
char ch;
int char_count;

char_count = 0;

// Prompt user to enter filename
printf(\"Enter a filename :\");
gets(file);
  
// Open file in read-only mode
fp = fopen(file,\"r\");

if ( fp )
{
      
   while ((ch=getc(fp)) != EOF) //Repeat until End Of File character is reached.
   {
       if (ch != \' \' && ch != \'\ \') // Increment character count if NOT new line or space
           {
           ++char_count;
           }

   }
}
else
{
printf(\"Failed to open the file\ \");
}
printf(\"Characters : %d \ \", char_count);

getchar();
return(0);
}