2023: gcc code coverage

.gitignore

+.vscode/
+*.c.gcov
+*.c.gcda
+*.c.gcno
+*.gcov
+*.gcda
+*.gcno
+multi
+*.o
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Makefile

+CC=gcc
+GCOV_FLAGS=-fprofile-arcs -ftest-coverage
+SOURCE1=multi
+SOURCE2=fun
+SOURCES=$(SOURCE1).c $(SOURCE2).c
+TARGET=multi
+
+$(TARGET): $(SOURCES)
+	$(CC) $(GCOV_FLAGS) $(SOURCES) -o $(TARGET)
+
+run: $(TARGET)
+	./$(TARGET)
+
+coverage: $(TARGET)
+	gcov $(SOURCE1).c
+	gcov $(SOURCE2).c
+
+details: $(TARGET)
+	cat $(SOURCE1).c.gcov
+	cat $(SOURCE2).c.gcov
+
+clean: $(TARGET).*
+	rm $(TARGET) $(SOURCE1).gcno $(SOURCE2).gcno $(SOURCE1).gcda $(SOURCE2).gcda $(SOURCE1).c.gcov $(SOURCE2).c.gcov

fun.c

+#include <stdio.h>
+void getMenu() {
+    printf("Enter your choice:\n");
+    printf("\t0 -- exit\n");
+    printf("\t1 -- task 1\n");
+    printf("\t2 -- task 2\n");
+    printf("\t3 -- task 3\n");
+}
+
+int getChoice() {
+    int c;
+    getMenu();
+    scanf("%d",&c);
+    return c;
+}
+
+void task1() {
+    int a, b;
+    a = 12;
+    b = 5;
+    printf("a %% b = %d\n", a%b);
+}
+
+void task2() {
+    int a, b;
+    a = 12;
+    b = 5;
+    printf("a - b = %d\n", a-b);
+}
+
+void task3() {
+    int a, b;
+    a = 12;
+    b = 5;
+    printf("a + b = %d\n", a-b);
+}
+
+void task4() {
+    int a, b;
+    a = 12;
+    b = 5;
+    printf("a * b = %d\n", a*b);
+}
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fun.h

+#ifndef __FUN__H__
+#define __FUN__H__
+
+int getChoice();
+void task1();
+void task2();
+void task3();
+void task4();
+
+#endif
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multi.c

+#include <stdio.h>
+
+#include "fun.h"
+
+int main(void) {
+    int choice;
+    int done;
+    done = 0;
+    do {
+        choice = getChoice();
+        switch (choice) {
+            case 0:
+                done = 1;
+                break;
+            case 1: task1();
+            case 2: task2(); break;
+            case 3: task3(); break;
+            case 5: break;
+            default:
+                done = 1;
+                break;
+        }
+    } while (!done);
+    return 0;
+}
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