Diff: main.cpp

Revision:

0:f5bbc63c654b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Oct 23 13:06:52 2017 +0000
@@ -0,0 +1,40 @@
+/*
+    Project: ArrayRunSize
+    File: main.cpp
+    Ported to mbed/Nucleo by: Dr. C. S. Tritt
+    Last revised: 10/22/17 (v. 1.1)
+
+    Horton Program 5.7 Averaging a variable number of grades. Runtime array
+    creation. Also demonstrates array output showing index values.
+
+*/
+#include "mbed.h"
+
+int main(void)
+{
+    printf("\nAssure Terminal > local echo is on.\n");
+    printf("Enter the number of grades: ");
+    size_t nGrades = 0; // Number of grades.
+    scanf("%zd", &nGrades); // The z is a type modifier for size type.
+    float grade[nGrades]; // Array storing nGrades values.
+    float sum = 0.0f; // Initialize sum of grades.
+    printf("\nEnter the %zd grades:\n", nGrades); // Prompt for grade entry.
+
+    // Read the grades to be averaged.
+    for(size_t i = 0 ; i < nGrades ; ++i) {
+        printf("%zd> ", i + 1);
+        scanf("%f", &grade[i]); // Read a grade.
+        sum += grade[i]; // Add it to the running sum.
+    }
+
+    // Display results.
+    printf("The grades you entered are:\n");
+    for(size_t i = 0 ; i < nGrades ; ++i) {
+        printf("Grade[%2zd] = %.1f ", i + 1, grade[i]);
+        if ((i+1) % 5 == 0) printf("\n"); // After 5 values, go to a new line.
+    }
+
+    float average = sum/nGrades; // Calculate and display the average.
+    printf("\nAverage of the %zd grades entered is: %.2f\n", nGrades, average);
+    while (true) {};
+}
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