Using - C
  
 Source Code
  

    
      #include<stdio.h>
      
void main() {
	int rows, cols, i,j;
	printf("Enter number of rows:  ");
	scanf("%d",&rows);
	printf("Enter number of columns:  ");
	scanf("%d",&cols);
	int a[rows][cols], b[rows][cols], c[rows][cols];
	
	printf("Enter Elements of 1st Matrix: \n");
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			scanf("%d",&a[i][j]);
		}
	}
	printf("Enter Elements of 2nd Matrix: \n");
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			scanf("%d",&b[i][j]);
		}
	}
	
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			c[i][j] = a[i][j] + b[i][j];
		}
	}
	
	printf("\n\nSUM OF TWO MATRICES:\n");
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			printf("%d  ",c[i][j]);
		}
		printf("\n");
	}
}    

Enter number of rows:  2
Enter number of columns:  2
Enter Elements of 1st Matrix:
10   12
21   24
Enter Elements of 2nd Matrix:
12   15
32   20
  
  
SUM OF TWO MATRICES:
22   27
53   44

        
Using - C++
        
 Source Code
        

        
          #include<iostream>
using namespace std;

int main() {
	int rows, cols, i,j;
	cout<< "Enter number of rows:  ";
	cin>> rows;
	cout<< "Enter number of columns:  ";
	cin>> cols;
	int a[rows][cols], b[rows][cols], c[rows][cols];
	
	cout<< "Enter Elements of 1st Matrix: \n";
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			cin>> a[i][j];
		}
	}
	cout<< "Enter Elements of 2nd Matrix: \n";
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			cin>> b[i][j];
		}
	}
	
	for(i=0; i < rows; i++) {
		for(j=0; j < cols; j++) {
			c[i][j] = a[i][j] + b[i][j];
		}
	}
	
	cout<< "\n\nSUM OF TWO MATRICES:\n";
	for(i=0; i < rows; i++){
		for(j=0; j < cols; j++){
			cout<< c[i][j]<< "  ";
		}
		cout<< "\n";
	}
}

Enter number of rows:  3
Enter number of columns:  3
Enter Elements of 1st Matrix:
10   20   30
15   35   25
36   21   28
Enter Elements of 2nd Matrix:
12   14   16
19   17   21
32   33   55
  
  
SUM OF TWO MATRICES:
22   34   46
34   52   46
68   54   83