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the question is easy (but I don't know what is wrong);please hurry.

Posted on 1998-04-13
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Last Modified: 2010-04-15
I am doing now a spreadsheet using two dimentional arrays I finished it but I can't seem to be able to add totals
for every row and coloum (like this):

1    0    3    4      t : 8

2    7    9    0      t : 18

4    6     4    1     t : 15

and the same for every coloumn . < I have been trying to do it for days but it won't happen> this is the code for the spreadsheet :

#include <math.h>
#include <stdio.h>
#define maxrows 20
#define maxcols  30
#define null 0
FILE *file_pointer;
char filename[]="data.text";
main()
{
int n,m,col,row,r,c,l,x,o,j;
float a[maxrows][maxcols],y ;
printf("how many rows do you want ?");
scanf("%d",&m);
printf("how many cols do you want ?");
scanf("%d",&n);
for (row=0;row<m;++row)
for(col=0;col<n;++col)
a[row][col] = 0.0;
for (row=0;row<m;++row)
{
printf(" \n \n");
for(col=0;col<n;++col)
printf("  %f  ",a[row][col]);
}
x=1 ;
while (x!=2)
{
printf("\n\n select the operation:1-add,2-sub,3-multi,4-div,5-quit,6-save,7-load\n\n");
scanf("%d",&l);
if(l<6){
if(l==5)break ;
printf("\n select the row of the cell : \n");
scanf("%d",&r);
printf("\n select the col. of the cell : \n");
scanf("%d",&c);
printf("\n select the amount you want to use : \n");
scanf("%f",&y);
c=c-1;
r=r-1;
if(l==1)
{
a[r][c]=y+a[r][c] ;
}
if(l==2){
a[r][c]=a[r][c]-y; }
if(l==3)
{a[r][c]=a[r][c]*y;}
if(l==4)
{a[r][c]=a[r][c]/y;}
}
else{
if(l==6){
file_pointer = fopen("data.text","w");
for( row=0; row< m; row++)
for( col=0; col< n; col++)
fprintf(file_pointer,"%f ", a[row][col]);
fclose(file_pointer);
}
if(l==7)
{
file_pointer=fopen("data.text","r");
for( row=0; row<m ; row++)
 for( col=0; col< n; col++)
fscanf(file_pointer,"%f", &a[row][col]);
fclose( file_pointer);
}
}
for (row=0;row<m;++row)
{
printf(" \n \n");
for(col=0;col<n;++col)
printf("  %f ",a[row][col]);
}
}
return 0 ;
}
0
Comment
Question by:habibi
2 Comments
 
LVL 10

Accepted Solution

by:
RONSLOW earned 200 total points
ID: 1258123
Just before you print out the array...

for(row=0;row<m;++row) {
  a[row][n] = 0.0;
  for(col=0;col<n;++col) {
    a[row][n] += a[row][col];
  }
}
for(col=0;col<n;++col) {
  a[m][col] = 0.0;
  for(row=0;row<m;++row) {
    a[m][col] += a[row][col];
  }
}

And change the print loop to be for (row=0;row<=m;++row) etc so that you print the total row/cols as well

You don't say if the total row/cols need to be read/written .. that's up to you.

0
 

Author Comment

by:habibi
ID: 1258124
Thank you very very much .
0

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