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If u don't want to remove all the previous contents of the file when u write in it, u can use append instead. The syntax is fptr = fopen("text.txt", "a");
If you create a file via write mode, or append mode, try naming your file aux FILE *file1; file1=fopen("aux.txt","w"); the file with this name won't be created naming a file aux is forbidden in Windows, try creating a folder r text document and naming it aux... just some random stuff to spice things up
how to setting when you run code the visual code show the time executing those code? I saw you just click run code and there are time of executing code available there.
#include int main(){ FILE* fptr; fptr = fopen("1.txt","w"); char contant[1000]; fputs("C is a fun programming language ",fptr); fputs("And,I love using C language :)",fptr); fclose(fptr); fptr = fopen("1.txt","r"); while(fgets(contant, 1000, fptr)){ printf("%s",contant); } return 0; }
is there another we condition we can use for that, because that doesnt realy make sense in my head,,, that statement does not return true or false, it just stores the line into the array
The fgets statement doesn't return true or false but it does return a non-Null pointer as it reads a line from the file and stores it in the 'content' array, which is evaluated as true in the loop's condition, causing the loop to continue. Once fgets reaches the end of the file, it returns a NULL pointer, which is evaluated as false in the loop's condition, causing the loop to terminate.
How can we open a file in a "for loop and create different files for each size of arrays. For example: For () { file 1 for array[0] File 2 for array[1].….. }
Option B : FILE* pointer; --------------------------------------------------------------------------------------------------------------- #include int main() { FILE* file; file = fopen("newFile.txt", "w"); fputs("C is a fun programming language ", file); fputs("And, I love using C language", file); fclose(file); file = fopen("newFile.txt", "r"); char content[1000]; while (fgets(content, 1000, file)); { printf("%s", content); } return 0; }
/* * Create a new file in write mode * Write Content * C is a fun programming language. * And, I love using C language * Close the file * Again open the file in read mode and read the content of the file */ #include int main(){ FILE* fptr; fptr = fopen("newText.txt", "w"); fputs("C is a fun programming language.",fptr); fputs(" And, I love using C language",fptr); fclose(fptr); fptr = fopen("newText.txt", "r"); char content[1000]; if (fptr != NULL){ while (fgets(content, 1000, fptr)){ printf("%s", content); } }else{ printf("File Open Unsuccessful"); } fclose(fptr); return 0; }
shouldn't the fclose() be inside if block, at its end. As in case of unsuccessful opening of file (execution of else statement) , fclose() doesn't make any sense. Please correct me if I'm wrong
#include #include // Include for exit() function int main() { FILE* fptr; char content[1000]; char userInput[1000]; // Open the file in write mode fptr = fopen("NewFile.txt", "w"); if (fptr == NULL) { printf("Error opening file. "); exit(1); } // Prompt the user to enter text printf("What do you want to add in NewFile.txt? "); fgets(userInput, sizeof(userInput), stdin); // Write user input to the file fputs(userInput, fptr); // Close the file fclose(fptr); // Open the file in read mode fptr = fopen("NewFile.txt", "r"); if (fptr == NULL) { printf("Error opening file. "); exit(1); } // Read and print the contents of the file printf("Contents of NewFile.txt: "); while (fgets(content, sizeof(content), fptr)) { printf("%s", content); } // Close the file fclose(fptr); return 0; }
#include int main() { // Write C code here FILE* fptr; fptr=fopen("File.txt","w"); char content[1000]; fputs("C is a fun programming language",fptr); fputs("And I love C language",fptr); fptr=fopen("File.txt","r"); fgets(content,1000,fptr); fclose(fptr); return 0; } It shows the segmentation fault error in the online c programming
// Online C compiler to run C program online #include int main() { FILE* fptr; fptr = fopen("one piece.txt","r"); char content[1000]; fputs("i love one piece anime ",fptr); fputs("the most one that i love in one piece is lufy", fptr); fclose(fptr); fptr = fopen("one piece.txt","r"); while(fgets(content, 1000, fptr)){ printf("%s",content); } return 0; }
#include int main() { FILE* fptr; fptr = fopen("newFile.txt", "w"); fputs("C is a fun programming language ", fptr); fputs("And, I love using C language", fptr); fclose(fptr); char content[1000]; fptr = fopen("newFile.txt", "r"); if (fptr != NULL) { while (fgets(content, 1000, fptr)) { printf("%s", content); } } else { printf("File Open Unsuccessful"); } fclose(fptr); return 0; }
