C language doesn’t scan variable after reading that variable as string(or char) instead of integer But the most weird is that it is entering in infinite loop int main( ){ int answer; printf("Hello\n"); while (answer != 3){ start();//It is declared above scanf("%d",&answer); switch (answer) { case 1:{ showCenters();//Also declared break;} case 3:{ break;} default:{ printf("Invalid… Read More C language doesn't scan variable

I am working on a simple project of C-Programming called "Election System". But i want to optimize it so the output will never be wrong. So for this i need this:- How to write a program to ask the user for an input between 1-20 but it prints "invalid input" if user enters "any character… Read More How to write a program to ask the user for an input between 1-20 but it prints "invalid input" if user enters any char or string or (-ve) integers?

i am trying to enter string values (more than 1 for each array) for a1 and a2. I want to print them row by row but the program don’t print any of the values. How can i fix it? #include<stdio.h> int main (void){ int i; char *a1[10], *a2[10]; for (i=0; i<10;i++){ printf("Enter text %d for… Read More why i can't print this array with using pointers?

Hy guys, I just started to learn C and I’m having a problem, with my code. I’m trying to make a simple program which will take the input (name, password) and append it in a file. int main() { printf("1. Register\n"); printf("2. Login\n"); printf("Please enter your choice: "); int choice; FILE *file = fopen("data.txt", "a");… Read More Check for spaces from input stdin in C not working

The IDE I used is Clion. I wanna read the Line-separated data stored in .txt file. Each line contains firstname, surname, gender, ID and age, which are str, str, str, int and int. StudentList.txt Olivia SWANSON F 29001 20 Emma ONEILL F 7900 19 I try to use fscanf to read the data. FILE *fp;… Read More Values lossing in fscanf

I am stuck in this program, help me, it’ll be appreciatable. But, scanning the characters together might work. I want to know why is scanf not asking for the character in 2nd time. #include <stdio.h> int main() { printf("–Mathematical operations on character to get other character–\n"); char a, b; printf("Enter the 1st character: \n"); scanf("%c",… Read More why is the c function not scanning 2nd time using scanf function?

I have written the following code: #include <stdio.h> int main() { char s[10]; while (fscanf(stdin, "%10s", s) != 1) { } printf("%s", s); } However the code runs perfectly fine. How is this? The buffer s is size 10 but if i input a string such as helloworld which is 10 characters long the printf… Read More how does this code not cause a buffer overflow?

I am fairly new to C and I am having trouble using scanf with pointers. I have been told to get user inputs for 3 int and 1 char values and then print them back out using pointers. This is the best I could come up with so far: int a, b, c; char d;… Read More Using Scanf with pointers

I have hard time understanding how scanf in C works. I need the code below to fail with the input 123 foo. #include <stdio.h> int main () { int i; if (scanf ("%d text", &i) != 1) { return 1; } return 0; } I found in C refs that scanf correctly returns the number… Read More scanf in C doesn't fail when formatted text doesn't match

I was trying to read a file char by char but the debugger when reaches the fscanf gives back a segmentation fault error, here’s my code: int main(){ FILE *inFile; char *carattere = NULL; inFile = fopen("../file.txt", "r"); if (inFile == NULL){ return -1; } while(fscanf(inFile, "%c", carattere) != EOF){ //segmentation fault printf("%c ", *carattere);… Read More segmentation fault error when reading a file in C