Segmentation fault in array

Question

try to get number of rows and column from user through array but it gives Segmentation fault at run time

#include<stdio.h>
int main(){
    int rows;
    int column;
    int arr[rows];
    int arr1[column];
    
    printf("Enter the number of rows: ");
    scanf("%d",&rows);
    printf("Enter the number of column: ");
    scanf("%d",&column);
    printf("\n");
    
int i=0;
while( i<rows)
{  printf("\n");
   printf("Enter the value of rows index: " );
   scanf("%d",&arr[i]);
   printf("\n");
    i++;
}
int j=0;
while(j<column)
{
   printf("Enter the value of rows index: " );
   scanf("%d",&arr1[j]);
   printf("\n");
    j++;
}
}

// giving Segmentation fault

NoDakker · Accepted Answer · 2022-12-03 00:49:20Z

1

At the time of your definition for the "arr" and "arr1" arrays, the value of column and rows is undefined.

int rows;
int column;
int arr[rows];
int arr1[column];

Move the declaration of those arrays after you have received input from the user.

printf("Enter the number of rows: ");
scanf("%d",&rows);
printf("Enter the number of column: ");
scanf("%d",&column);
printf("\n");
int arr[rows];
int arr1[column];

Give that a try and see if that addresses your segmentation fault.

answered Dec 3, 2022 at 0:49

NoDakker

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