Geeks Talk - C and C++

A program using pointers

pichaiah2009 — Wed, 18 Nov 2009 10:46:46 GMT

Hi All,

The following program compiled without error.But when I run it the output is erroneous.Can sombody pointout the mistake in the code.

/*Product of two matrices*/
#include "stdio.h"
#define MAXCOLS 10
Main( )
{
int fmrows,fmcols,smrows,smcols,i,j,m,n,p;
int (*a)[MAXCOLS],int (*b)[MAXCOLS],int (*c)[MAXCOLS];
void readinput(int (*a)[MAXCOLS],int m,int n);
void computeprod(int (*a)[MAXCOLS],int (*b)[MAXCOLS],int (*c)[MAXCOLS],int m,int n, int p);
void writeoutput(int (*c)[MAXCOLS],int m,int p);
clrscr();
printf("How many rows for a?");
scanf("%d",&fmrows);
printf("How many columns for a?");
scanf("%d",&fmcols);
printf("How many rows for b?");
scanf("%d",&smrows);
printf("How many columns for b?");
scanf("%d",&smcols);
/*allocate initial memory*/
a=(int (*)[MAXCOLS] malloc(fmrows*fmcols*sizeof(int));
b=(int (*)[MAXCOLS] malloc(smrows*smcols*sizeof(int));
c=(int (*)[MAXCOLS] malloc(fmrows*smcols*sizeof(int));
printf("\n\nFirst matrix:\n");
readinput(a,fmrows,fmcols);
printf("\n\nSecond matrix:\n");
readinput(b,smrows,smcols);
computeprod(a,b,c,fmrows,fmcols,smcols);
printf("\n\nProduct of the matrices:\n");
writeoutput(c,fmrows,smcols);
getch();
return(0);
}
void readinput(int (*a)[MAXCOLS],int m,int n)
{
int i,j;
for(i=0;i printf("\nEnter data for row No. %2d\n",i+1);
for(j=0;j scanf("%d",&a[i][j]);
}
return;
}
void computeprod(int (*a)[MAXCOLS],int (*b)[MAXCOLS],int (*c)[MAXCOLS],int m,int n,int p)
{
int i ,j ,sum;
for(i=0;i for(j=0;j sum=0;
for(k=0;k sum+=a[i][k]*b[k][j];
c[i][j]=sum;
}
return;
}
void writeoutput(int (*c)[MAXCOLS],int m,int p)
{
int i,j;
for(i=0;i for(j=0;j printf("%d\t", c[i][j]);
printf("\n");
}
return;
}

C Challenge Problem No #01

aman15490 — Wed, 18 Nov 2009 00:46:52 GMT

Q 1 What will be the output of the following program :

int main()
{
printf();
return(0);
}
(a)Run-Time Error
(b)Compile-Time Error
(c)No Output
(d)None of these

Adding our functions in library

aman15490 — Sun, 15 Nov 2009 02:46:51 GMT

Please anyone can illustrate the procedure for adding user defined functions
in the library.

Compiling and Executing Program

aman15490 — Sun, 15 Nov 2009 02:04:19 GMT

I am using turbo c compiler and i am compiling and executing program directly using alt+F9 and ctrl+F9 . Is there any other way to compile and execute c program.

Command Line Arguments

aman15490 — Sun, 15 Nov 2009 02:00:29 GMT

Please anybody can explain me how to use command line arguments in c.
I am using TURBO C compiler.

Advance test In C

aman15490 — Thu, 12 Nov 2009 05:56:13 GMT

I am Uploading a Document File that contains Good Questions in c.
Also give your comments about the post and rate it pleaseeeeeeeee.

Attached Files

Advanced Test in C.doc (120.5 KB)