Thread: What is wrong with the code? How the element values of array changes?

Code:

#include <stdio.h>

int main()
{
	int i,j,row=1,col=3,sum=0;
	int a[row][col];
	printf("Enter the elements on by one:");
	for(i=1;i<=row;i++)
	{
		for(j=1;j<=col;j++)
		{
			scanf("%d",&a[i][j]);						
		}
	}
	
	printf("The A matrix \n");
	for(i=1;i<=row;i++)
	{
		for(j=1;j<=col;j++)
		{
			printf("%5d",a[i][j]);			
		}
		printf("\n");
	}
	int colsum[col];	//To calculate column sum
	for(j=1;j<=col;j++)
	{
		colsum[j]=0;
		for(i=1;i<=row;i++)
		{
			colsum[j] = colsum[j] + a[i][j];
		}
	}
	printf("The A matrix \n");
	for(i=1;i<=row;i++)
	{
		for(j=1;j<=col;j++)
		{
			printf("%5d",a[i][j]);			
		}
		printf("\n");
	}
	printf("\n The Column Sum is =");
	for(i=1;i<=col;i++)
		{
			printf("%5d",colsum[i]);			
		}
	return(0);
}

Agreed, subscript start at 0, but starting at 1 is not invalid.