Question

Modify this program so that it takes in input from a TEXT FILE and outputs the results in a seperate OUTPUT FILE. (C programming)!

Program works just need to modify it to take in input from a text file and output the results in an output file.

________________________________________________________________________________________________

#include <stdio.h>

#include <string.h>

// Maximum string size

#define MAX_SIZE 1000

int countOccurrences(char * str, char * toSearch);

int main()

{

char str[MAX_SIZE];

char toSearch[MAX_SIZE];

char ch;

int count,len,a[26]={0},p[MAX_SIZE]={0},temp;

int i,j;

//Take user's input

printf("Enter any string : ");

gets(str);

//store length of string

len=strlen(str);

//array "a" contains count of every character

for(i=0;i<len;i++)

{

if(str[i]>='a'&&str[i]<='z')

a[str[i]-'a']++;

}

//output the result

for(i=0;i<26;i++)

{

if(a[i]!=0)

{

ch=i +'a';

printf("%c occurs %d times\n",ch,a[i]);

}

}

//array "p" contains count of length of every word

for(i=0;i<len;i++)

{

temp=0;

while(i<len&&str[i]!=' ')

{

temp++;

i++;

}

p[temp]++;

}

//output the result

for(i=0;i<MAX_SIZE;i++)

{

if(p[i]!=0)

{

printf("Word length %d occurs %d times\n",i,p[i]);

}

}

for(i=0;i<len;i++)

{

memset ( toSearch, 0, MAX_SIZE );

temp=0;

while(i<len&&str[i]!=' ')

{

toSearch[temp]=str[i];

temp++;

i++;

}

count = countOccurrences(str, toSearch);

printf("Total occurrences of '%s' is %d\n", toSearch, count);

}

return 0;

}

int countOccurrences(char * str, char * toSearch)

{

int i, j, found, count;

int stringLen, searchLen;

stringLen = strlen(str); // length of string

searchLen = strlen(toSearch); // length of word to be searched

count = 0;

for(i=0; i <= stringLen-searchLen; i++)

{

/* Match word with string */

found = 1;

for(j=0; j<searchLen; j++)

{

if(str[i + j] != toSearch[j])

{

found = 0;

break;

}

}

if(found == 1)

{

count++;

}

}

return count;

}

Answer 1

please check out your updated code... the added part and the updated part is mentioned... for any kind of doubt, please leave a comment....

as per your question, the program works properly... so, only the file part is added/modified i.e. only the file reading and writing part is added

code

#include <stdio.h>
#include <string.h>
// Maximum string size
#define MAX_SIZE 1000
int countOccurrences(char * str, char * toSearch);
int main()
{
char str[MAX_SIZE];
char toSearch[MAX_SIZE];
char ch;
int count,len,a[26]={0},p[MAX_SIZE]={0},temp;
int i,j;
FILE *fp1,*fp2;   //ADDED
char fname[20];    //ADDED
//Take user's input
//printf("Enter any string : ");     //******REMOVED********/
//___________ADDED__________
printf("\nEnter the source file :");
scanf("%s",fname);
fp1=fopen(fname,"r");   //OPENING FILE
i=0;
while(1){
        ch = fgetc(fp1);  //SCANNING CHARACTER BY CHARACTER
        if(ch==EOF){
                str[i]='\0';
                break;
                }
        str[i]=ch;   //STORING THE CHARACTER IN THE CHARACTER ARRAY
        i++;
        }
fclose(fp1);   //READING COMPLETE

//____________________________________NEWLY ADDED________________

//gets(str);   //__________________________NOT REQUIRED
//store length of string
len=strlen(str);
//array "a" contains count of every character
for(i=0;i<len;i++)
{
if(str[i]>='a'&&str[i]<='z')
a[str[i]-'a']++;
}
//output the result
//______________ADDED________________
printf("\nEnter the output file : ");
scanf("%s",fname);
fp2=fopen(fname,"w");
fprintf(fp2,"______________CHARACTER_OCCURANCE_____________________\n");
//______________-UPTO THIS__________
for(i=0;i<26;i++)
{
if(a[i]!=0)
{
ch=i +'a';
fprintf(fp2,"%c occurs %d times\n",ch,a[i]);  //___________MODIFIED___________
}
}
//array "p" contains count of length of every word
fprintf(fp2,"________________COUNT OF EVERY WORD_________________\n");    //____________--ADDED_____________
for(i=0;i<len;i++)
{
temp=0;
while(i<len&&str[i]!=' ')
{
temp++;
i++;
}
p[temp]++;
}
//output the result
for(i=0;i<MAX_SIZE;i++)
{
if(p[i]!=0)
{
fprintf(fp2,"Word length %d occurs %d times\n",i,p[i]);//___________MODIFIED___________
}
}
fprintf(fp2,"\n_____________________WORD OCCURANCE_______________\n");     ////___________MODIFIED___________
for(i=0;i<len;i++)
{
memset ( toSearch, 0, MAX_SIZE );
temp=0;
while(i<len&&str[i]!=' ')
{
toSearch[temp]=str[i];
temp++;
i++;
}
count = countOccurrences(str, toSearch);
fprintf(fp2,"Total occurrences of '%s' is %d\n", toSearch, count);  ////___________MODIFIED___________
}
fclose(fp2);  //__________-ADDED_______________
return 0;
}

int countOccurrences(char * str, char * toSearch)
{
int i, j, found, count;
int stringLen, searchLen;
stringLen = strlen(str); // length of string
searchLen = strlen(toSearch); // length of word to be searched
count = 0;
for(i=0; i <= stringLen-searchLen; i++)
{
/* Match word with string */
found = 1;
for(j=0; j<searchLen; j++)
{
if(str[i + j] != toSearch[j])
{
found = 0;
break;
}
}
if(found == 1)
{
count++;
}
}
return count;
}