Question

How can i addition one + one matric (array data structure) and after it find the third smallest number in it in C language (not C++)? Thank you for the code.

Answer 1

Example code follows:

void addMatrix(unsigned int size, double const * const a, double const * const  b, double * const res) {
   int i;
   for (i = 0; i < size * size; ++i)
       res[i] = a[i] + b[i];
}

double findThirdSmallest(unsigned int size, double const * const input) {
   //save the three smallest values inside res
   double res[3];
   int i;
   for (i = 0; i < 3; ++i) {
       res[i] = LDBL_MAX;
   }
   for (i = 0; i < size * size; ++i) {
       int j;
       for (j = 0; j < 3; ++j) {
           if (input[i] < res[j]) {
               int k;
               for (k = 2; k != j; --k) {
                   res[k] = res[k - 1];
               }
               res[j] = input[i];
               break;
           }
       }
   }
   return res[2];
}

EDIT: Changing the type and the size of the matrix will be your work.