#include <stdio.h>

int main(void) {
  int dm[10][10];
  int matrix[10][10];
  int sum[10][10];

  int i,j;

   FILE *read_file;
   FILE *read_file2;
   FILE *write_file;

   if((read_file=fopen("mata.txt","r"))==NULL){
     printf("Failed to open file (mata.txt).");
     return 0;
   }
    else {
      for(i=0;i<10;i++){
        for(j=0;j<10;j++){
          fscanf(read_file,"%d",&dm[i][j]);
        }
      }
    } fclose(read_file);

    if((read_file2=fopen("matb.txt","r"))==NULL){
     printf("Failed to open file (matb.txt).");
     return 0;
   }
    else {
      for(i=0;i<10;i++){
        for(j=0;j<10;j++){
          fscanf(read_file2,"%d",&matrix[i][j]);
        }
      }
    } fclose(read_file2);

    for(i=0;i<10;i++){
      for(j=0;j<10;j++){
        sum[i][j]=0; sum[i][j]=dm[i][j]+matrix[i][j];
      }
    }
    if((write_file = fopen("sum.usr", "w")) == NULL) {
         printf("Failed to open file (sum.usr)."); 
       } 
       else {
         for(i = 0; i < 10; i++) {  
           for(j = 0; j < 10; j++) {  
             if(j == 9) { 
               fprintf(write_file, "%d\n", sum[i][j]); 
             }  
             else {
               fprintf(write_file, "%d ", sum[i][j]); 
             } 
           } 
         }
       } 
    fclose(write_file);

      printf("The sum of the matrices has been calculated into the file sum.usr.\n");


      

  return 0;
}