C program to calculate sum of non_diagonal elements of an n*n matrix.

Write a ‘C’ program to calculate sum of non_diagonal elements of an n*n matrix.

#include<stdio.h>
#include<conio.h>
void main()
{
int a[3][3],i,j,sum=0;
clrscr();
printf("\nENTER THE 3 X 3 MATRIX\n");
for(i=0;i<=2;i++)
{
for(j=0;j<=2;j++)
{
scanf("%d",&a[i][j]);
}
}
for(i=0;i<=2;i++)
{
for(j=0;j<=2;j++)
{
if(i!=j)
{
sum=sum+a[i][j];
}
}
}
printf("\n SUM OF NON-DIAGONAL ELEMENTS OF MATRIX IS :%d",sum);
getch();
}

C program to count the number of characters, number of words and number of lines of a text file and display the result.

Write a ‘C’ program to count the number of characters, number of words and number of lines of a text file and display the result.

#include<stdio.h>
#include<conio.h>
void main()
{
FILE *fp;
char ch;
int noc=0,now=0,nol=0;
clrscr();
fp=fopen("a.txt","r");
if(fp==NULL)
{
printf("file does not exist");
exit(0);
}
while(1)
{
ch=fgetc(fp);
if(ch==EOF)
 break;
noc++;
if(ch==' ')
now++;
if(ch=='\n')
nol++;
}
printf("%d\n%d\n%d",noc,now,nol);
fclose(fp);
getch();
}