CSC264 Computer Org & Arch II

Exam 2 Answers

     int sameSum(float one[], float two[], int size) {
        float sumOne = 0;
        float sumTwo = 0;
        int i;
        for (i = 0 ; i < size ; i++) {
           sumOne = sumOne + one[i];
           sumTwo = sumTwo + two[i];
        }
        if (sumOne == sumTwo)
           return 1;
        else
           return 0;
     }

     int sameSum(float[], float[], int);
     int main() {
        float first[50];
        float second[50];
        int flag;
        int i;
        for (i = 0 ; i < 40 ; i++) {
           printf("enter a number: ");
           scanf("%f", &first[i]);
        }
        for (i = 0 ; i < 40 ; i++) {
           printf("enter a number: ");
           scanf("%f", &second[i]);
        }
        flag = sameSum(first, second, 40);
        if (flag)
           printf("the sums are the same\n");
        else
           printf("the sums are different\n");
     }

1. 74458
2. 100
3. s = &nn;
4. 74462
5. 101
6. 75
7. 74466
8. *s = *s + 1;
9. r = r + 3;

   third fourth (12)
   r i
   less!
   firstPsecondthird fourth

  int change(char* str) {
     int i = 0;
     int numMod = 0;
     while (*(str+i) != '\0') {
        if (*(str+i) < 'a' || *(str+i) > 'z') {
           *(str+i) = '#';
           numMod++;
        }
        i++;
     }
     return numMod;
  }

   char str[81];
   puts("enter a string");
   gets(str);
   int num = change(str);
   printf("your string is: %s (%d chars replaced)\n", str, num);

   int main() {
      char strings[20][51];
      FILE *pfile = fopen("poem.dat", "r");
      int i;
      int numstr = 0;
      int numrep;
      while (fgets(strings[i], 51, pfile) != NULL)
         numstr++;
      for (i = 0 ; i < numstr ; i++) {
         numrep = change(strings[i]);
         printf("your string is: %s (%d chars replaced)\n", str, numrep);
      }
   }