Four score and seven years ago our fathers brought forth on this continent a new

Question

Four score and seven years ago our fathers brought forth on this
continent a new nation, conceived in liberty, and dedicated to
the proposition that all men are created equal.

Now we are engaged in a great civil war, testing whether that
nation, or any nation so conceived and so dedicated, can long
endure. We are met on a great battlefield of that war. We have
come to dedicate a portion of that field, as a final resting
place for those who here gave their lives that that nation might
live. It is altogether fitting and proper that we should do this.

But, in a larger sense, we can not dedicate, we can not
consecrate, we can not hallow this ground. The brave men, living
and dead, who struggled here, have consecrated it, far above our
poor power to add or detract. The world will little note, nor long
remember what we say here, but it can never forget what they did
here. It is for us the living, rather, to be dedicated here to the
unfinished work which they who fought here have thus far so nobly
advanced. It is rather for us to be here dedicated to the great
task remaining before us-that from these honored dead we take
increased devotion to that cause for which they gave the last full
measure of devotion-that we here highly resolve that these dead
shall not have died in vain-that this nation, under God, shall have
a new birth of freedom-and that government of the people, by the
people, for the people, shall not perish from the earth.

Problem 1 (35 points): grep We wish to create a utility that will search a text file for a specified string. Unix has a command line utility that does this called grep, which is a funny acronym that stands for globally search a regular expression and print Write a C program that will search a text file for a specified string Your program should a) Prompt the user for the name of the file to be searched. b) Prompt the user for the string to be found in the file. c) Print the name of the file searched d) If the string is found then print the entire line of text where the string was found and the line number e) Print the number of times the string was found Assumptions for this assignment Assume that all strings have a maximum length of 200 characters .Assume that each line of the file being scarched is no more than 200 characters long. Assume case sensitivity. For example, if the file being searched contains OK and the string to find is ok then a match is not found; i.e. you do not need to worry about changing uppercase characters to lowercase or vice versa

Explanation / Answer

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#define STR_LEN 200

void search_and_print(char *fname, char *str);

//main function.

int main(int argc, char *argv[]) {

int result, errno;

char filename[25], search_string[25];

  

//Use system("cls") on windows

//Use system("clear") on Unix/Linux

//system("cls");

printf("Enter a file name: ");

scanf("%s",filename);

  

printf("Enter in the search string: ");

scanf("%s",search_string);

  

//printf();

  

search_and_print(filename, search_string);

  

return(0);

}

void search_and_print(char *fname, char *str) {

FILE *fp;

int line_num = 1;

int find_result = 0;

char temp[STR_LEN];

if((fopen_s(&fp, fname, "r")) != NULL) {

return(-1);

}

while(fgets(temp, STR_LEN, fp) != NULL) {

if((strstr(temp, str)) != NULL) {

printf("Found %s on line %d:%s ", str, line_num,temp);

find_result++;

}

line_num++;

}

printf(" The string %s was found a total of %d times in the file:%s",str,find_result,fname);

//Close the file if still open.

if(fp) {

fclose(fp);

}

return(0);

}

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