ex43.c - 9511_workbook - solved exercises from algorithms & programming I (9511) prof. Cardozo

guia03/ex43.c (474B)

Line numbers

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <time.h>
   4 
   5 #define N 4
   6 
   7 int main (void)
   8 {
   9     double matrix[N][N];
  10     double trace;
  11 
  12     srand((unsigned int)time(NULL));
  13 
  14     for(size_t i = 0; i < N; i++) {
  15         putchar('(');
  16         putchar(' ');
  17         for(size_t j = 0; j < N; j++) {
  18             matrix[i][j] = ((double)rand()/(double)(RAND_MAX)) * 20;
  19             printf("%5.2f ", matrix[i][j]);
  20         }
  21         putchar(')');
  22         putchar('\n');
  23         trace += matrix[i][i];
  24     }
  25 
  26     printf("\nTrace = %2.2f.-\n", trace);
  27     return 0;
  28 }