systempause return 0 void doublerdouble x x x 2 void printarraydouble a int

Systempause return 0 void doublerdouble x x x 2 void

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system("pause");      return 0;  }    void doubler(double *x) {       *x = *x * 2;  }    void print_array(double a[], int size) {        int i;                for (i = 0;  i < size;  ++i)               printf("%.2f\t", a[i]);        printf("\n");  }
13 Example 5 /* Doubles each element of an array */ #include <stdio.h> #define SIZE 8 /* maximum number of items in list of data */ void double_array(double a[], int size); void print_array(double a[], int size); int main(void) { double x[SIZE]; int i; printf("Enter %d integer numbers separated by blanks\n> ", SIZE); for (i = 0; i < SIZE; ++i) scanf("%lf", &x[i]); printf("Before doubling: "); print_array(x, SIZE); double_array(x, SIZE); printf("After doubling: "); print_array(x, SIZE); system("pause"); return 0; } void double_array(double a[], int size) {      int i;            for (i = 0;  i < size;  ++i)             a[i] *= 2; }   void print_array(double a[], int size)  {        int i;                for (i = 0;  i < size;  ++i)               printf("%.2f\t", a[i]);        printf("\n");  }
14 Example 6 /* Finds the average of elements in an array */ #include <stdio.h> #define SIZE 5 /* maximum number of items in list of data */ double get_average(double a[], int size); int main(void) { double x[SIZE], average; int i; printf("Enter %d integer numbers separated by blanks\n> ", SIZE); for (i = 0; i < SIZE; ++i) scanf("%lf", &x[i]); average = get_average(x, SIZE); printf("The average of the elements in the array is %.2f\n", average); system("pause"); return 0; } double get_average(double a[], int size) { int i; double sum = 0; for (i = 0; i < size; ++i) sum += a[i]; return sum/size; }
15 Example 7 /* Finds the maximum and minimum elements from an array */ #include <stdio.h> #define SIZE 8 /* maximum number of items in list of data */ void get_max_min(double a[], int size, double *max, double *min); int main(void) { double x[SIZE], maximum, minimum; int i; printf("Enter %d integer numbers separated by blanks\n> ", SIZE); for (i = 0; i < SIZE; ++i) scanf("%lf", &x[i]); get_max_min(x, SIZE, &maximum, &minimum); printf("The maximum element in the array is %.2f\n", maximum); printf("The minimum element in the array is %.2f\n", minimum); system("pause"); return 0; } // uses output parameter to return max & min void get_max_min(double a[], int size, double *max, double *min) { int i; *max = a[0]; *min = a[0]; for (i = 1; i < size; ++i) { if (a[i] > *max) *max = a[i]; else if (a[i] < *min) *min = a[i]; } }
16 Returning an array result In C, the return type of a function cannot be an array. Thus, to return an array as result from a function, the only option is to use output parameter. We recall that output parameters for a function are declared as pointer variables. However, as mentioned earlier, an array variable is a pointer variable. Therefore formal parameters of type array are already output parameters.

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• Spring '10
• baleh
• Array, size

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