Thread: matrix summation

anyone help me to correct the code ? where's the error ?

Code:

// MATRIX SUMMATION 

        

       #include<stdio.h>

       # define MAXROWS 20
       # define MAXCOLS 30


       void readinput (int a[][MAXCOLS], int nrows, int ncols );
       void computesums (int a[][MAXCOLS], int b[][MAXCOLS], int c[][MAXCOLS], int nrows, int ncols);
       void writeoutput ( int c[][MAXCOLS] , int nrows, int ncols);


	   void main()

	   {
	     
		   
		 int nrows, ncols;
		 int a[MAXROWS][MAXCOLS], int B[MAXROWS][MAXCOLS] , int C[MAXROWS][MAXCOLS] ;

		 printf("How many rows?");
		 scanf("%d", &nrows);
		 printf("How many columns?");
		 scanf("%d", &ncols);

		 printf("\n\nFirst matrix:\n");
		 readinput(a,nrows, ncols);

		 printf("\n\nSecond matrix:\n");
		 readinput(b,nrows, ncols);

		 computesums (a,b,c, nrows, ncols);
		 printf("\nSums of the elements:\n\n");
		 writeoutput(c, nrows, ncols);


	   }


	   void readinput( int a[][MAXCOLS], int m , int n)

	   {
	    int row,col ;
		for(row=0;row<m; ++ row)

		{
			printf("\nEnter the data for row no. %d\n", row+1);

			for(col=0;col<n;++col)

				scanf("%d", &a[row][col]);
		
		}

		return;

	   }
     

	   void computesums( int a[][MAXCOLS] , int a[][MAXCOLS], int c[][MAXCOLS] , int m, int n)

	   {
	    
		   int row, col;
		   for(row=0; row<m;++row)

			for(col=0; col<n;++col)

				c[row][col]=a[row][col]+b[row][col] ;
			
			return;

	   }


	   void writeoutput( int c[][MAXCOLS], int m, int n)

	   {
	    int row, col;
		for(row=0;row<m;++ row)

		{
		 
		  for(col=0; col<n;++col)

		  printf("%d", a[row][col]);
		  printf("\n");


		}

		return;

	   }