1 // Calculates the arithmetic mean of a certain amount of 2 // numbers. First ask for the quantity and then calculates 3 // it and prints it; 4 5 #include <stdio.h> 6 #include <stdlib.h> 7 8 #define MAX_LEN 20 9 10 int main (void) { 11 12 int i, n; 13 float x, suma, numbers[MAX_LEN]; 14 char buffer[MAX_LEN]; 15 16 // Read the quantity of numbers to mean; 17 if(fgets(buffer, sizeof(int) + 1, stdin) != NULL) 18 n = atoi(buffer); 19 else return 1; 20 21 // Read the values to mean and stores it on numbers; 22 for(i = 0, suma = 0; i < n; i++) { 23 if(fgets(buffer, sizeof(int) + 1, stdin) != NULL) { 24 numbers[i] = atof(buffer); 25 suma += numbers[i]; 26 } else return 1; 27 } 28 // Calculate the arithmetic mean and stores it on x; 29 x = ((1 / (float)n) * suma); 30 31 // Print the arithmetic mean; 32 printf("x = %.3f\n", x); 33 return 0; 34 }
