How to calculate the values in a table

[nzrusty]

Im trying to work out the total values of a table, which i have read from a file

x y
1.0 2.876
2.6 4.234
3.7 8.874
4.5 7.698
6.0 9.932

I want to work out the total values of x, i.e sum of.

How would i implement this, please. thanks, here is what i have so far. Im new so there maybe quite a few errors. Its displaying the file ok, and the number of values, but i cant get it to work out the sum of the x values, please, help.
thanks.


#include <stdio.h>
#include <math.h>

int main(void)

{
char line [101];
char *line_ptr;
double x, y;
int no_values=-1;
double sum_x;
int i=0;

FILE *input_stream;

if ((input_stream= fopen("test_dat a.dat", "r")) != NULL)

{
while ((line_ptr=fget s(line, sizeof(line), input_stream))! = NULL)

{
if ((sscanf (line, "%d %d", &x, &y)) != 2)
{
no_values++;
fprintf (stdout, "%s\n", line);
}
}
}

fprintf(stdout, "\n\n\n\nno_val ues: %d\n", no_values);

for (i=0; i<=no_values; i++)

{
sum_x= x;
}

fprintf(stdout, "\n\n\n\nsu m_x: %lf\n", sum_x);


}

[Ganon11]

http://www.thescripts. com/forum/thread576241.ht ml