How do I search a string in a file in C programming?

Asked by Last Modified  

3 Answers

Learn C Language

Follow 1
Answer

Please enter your answer

Learning Education

#include stdio.h #include string.h #include stdlib.h #ifdef DEBUG #define INITIAL_ALLOC 2 #else #define INITIAL_ALLOC 512 #endif char * read_line(FILE *fin) { char *buffer; char *tmp; int read_chars = 0; int bufsize = INITIAL_ALLOC; char *line = malloc(bufsize); ...
read more
#include stdio.h #include string.h #include stdlib.h #ifdef DEBUG #define INITIAL_ALLOC 2 #else #define INITIAL_ALLOC 512 #endif char * read_line(FILE *fin) { char *buffer; char *tmp; int read_chars = 0; int bufsize = INITIAL_ALLOC; char *line = malloc(bufsize); if ( !line ) { return NULL; } buffer = line; while ( fgets(buffer, bufsize - read_chars, fin) ) { read_chars = strlen(line); if ( line[read_chars - 1] == '\n' ) { line[read_chars - 1] = '\0'; return line; } else { bufsize = 2 * bufsize; tmp = realloc(line, bufsize); if ( tmp ) { line = tmp; buffer = line + read_chars; } else { free(line); return NULL; } } } return NULL; } int main(int argc, char *argv[]) { FILE *fin; char *line; if ( argc != 3 ) { return EXIT_FAILURE; } fin = fopen(argv[1], "r"); if ( fin ) { while ( line = read_line(fin) ) { if ( strstr(line, argv[2]) ){ fprintf(stdout, "%s\n", line); } free(line); } } fclose(fin); return 0; } read less
Comments
Dislike Bookmark

Engineer

you have to declare the syntax and then type char filename=name.txt,line =2000,search string =number
Comments
Dislike Bookmark

Advance Excel And VBA Training

Please see the attached Images
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

Is C programming necessary to learn to become a software engineer?
C language is starting language for programming, if you will understand the concept of C language then it would be very easy to learn all programming language because somehow concepts are similar
Ujwalajagdale
0 0
View Comments7
What is the difference between a string and an array?
String is array of characters terminated with null.
Rakes
I am a C language Teacher. Please suggest me about the hourly charges to teach a student online? I have an experience of teaching offline or as a home tutor of 1+ year.I did my graduation in BCA & now pursuing MCA(2nd Year) from GGSIPU,Delhi. I have recently planned to start an online classes? please suggest how much to be charged from the student on a monthly basis if i teaches them 16hr/month for a month? Please provide your valuable suggestions?
300USD. I have done this earlier in 2008. Charge cheap and nobody responds!
Sumit Kumar
What is a void main() in the C programming language?
In C programming, void main() is an incorrect signature for the main function. The correct signature is int main(). The main function serves as the entry point for C programs and typically returns an integer...
Ambar
0 0
View Comments5
What is the use of "\n" in C language?
break a line into two and shift the remaining value/ characters to a new line.
Tanush
0 0
View Comments5

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Swapping variable contents using C
/* WAP to swap the content of variables using C*/ //Header files #include<stdio.h>#include<conio.h> //Main function void main(){ //Variable declaration of type integer int a,b,c; //function...

Salim Ahmed Ansari

0 0
View Comments0
Programming Practice Technique
Any Programming Language required an Algorithm. Algorithm - It is the finite set of instructions in which each and every instruction has the meaning, instructions are not ambiguous and all the instructions...

Phanindra Oruganti

1 0
View Comments0
Some Tricky Questions in C
Can you write two functions in which one executes before main function and other executes after the main function? #pragma startup #pragma exit Where, priority is optional integer value.For user priority...

Sahana D.

1 0
View Comments0
Efficient Learning Strategies
Type your notes after class Write your notes onto flashcards - Scrabble -Make posters Review flashcards while walking, at gym, etc. Dog-ear pages in the reading where you can find...

Vijith V T

1 0
View Comments0
Can we store different data types in a stack?
Yesterday, one of my Facebook friend asked me this question. My answer is "yes", and in this post I will discuss how could we do this.I am a great supporter of working with unions and I will be using union...

Shiladitya Munshi

0 0
View Comments0

Recommended Articles

Brilliant Academy, a reputed B. Tech Tuition...

Brilliant Academy is one of the reputed institutes for B.Tech tuition classes. This institute is specialised in delivering quality tuition classes for B.E, Engineering - all streams and Engineering diploma courses. Incorporated in 2012, Brillant Academy is a brainchild of Mr Jagadeesh. The main motto of the academy is to...

Read full article >

Lasya Infotech: An educational Training...

Lasya Infotech is a Hyderabad based IT training institute founded in 2016 by O Venkat. Believing in his innovation, passion and persistence and with a diverse blend of experience, he started his brainchild to deliver exemplary professional courses to aspiring candidates by honing their skills. Ever since the institute envisions...

Read full article >

Learn Hadoop and Big Data

Hadoop is a framework which has been developed for organizing and analysing big chunks of data for a business. Suppose you have a file larger than your system’s storage capacity and you can’t store it. Hadoop helps in storing bigger files than what could be stored on one particular server. You can therefore store very,...

Read full article >

Top 5 Skills Every Software Developer Must have

Software Development has been one of the most popular career trends since years. The reason behind this is the fact that software are being used almost everywhere today.  In all of our lives, from the morning’s alarm clock to the coffee maker, car, mobile phone, computer, ATM and in almost everything we use in our daily...

Read full article >

Find C Language Classes near you
C Language Classes in Bangalore
C Language Classes in Hyderabad
C Language Classes in Delhi
C Language Classes in Pune
C Language Classes in Mumbai
C Language Classes in Chennai
C Language Classes in Kolkata
C Language Classes in Noida
C Language Classes in Ghaziabad
C Language Classes in Gurgaon

Looking for C Language Classes?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you