Made a simple geometric workbench

misc/geometric_workbench/Makefile

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+all: geometric
+
+geometric: circle.c triangle.c rectangle.c
+	gcc circle.c -lm -o circle
+	gcc triangle.c -lm -o triangle
+	gcc rectangle.c -lm -o rectangle
+
+circle: circle.c
+	gcc circle.c -lm -o circle
+
+triangle: triangle.c
+	gcc triangle.c -lm -o triangle
+
+rectangle: rectangle.c
+	gcc rectangle.c -lm -o rectangle
+
+clean:
+	rm rectangle triangle circle
+

misc/geometric_workbench/README.md

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+# Geometric Workbench #
+This is just a simple idea I had to create a simple workbench with small tools
+to calculate the area of circles, triangles and rectangels. The whole point of
+this is to input data to for example the rectangle program and the triangle
+program and save those numbers in shell variables and to able to extract the
+triangle from the rectangle. To the input is expected to come from STDIN and
+output goes to STDOUT. So all those programs can exchange numbers with pipes.

misc/geometric_workbench/circle.c

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+#include <stdio.h>
+#include <math.h>
+
+/* Simple program to calculate the area and circumference of a circle.
+ * Remeber to compile with the -lm option to link the math library.
+ * The math library includes pow (to the power of) and M_PI (pi).
+ */
+
+int main()
+{
+    float radius;
+    scanf("%f", &radius);
+    printf("%.3f\n", M_PI*(pow(radius, 2))); 
+    return 0;
+}

misc/geometric_workbench/rectangle.c

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+#include <stdio.h>
+#include <math.h>
+
+/* Simple program to calculate the area and circumference of a circle.
+ * Remeber to compile with the -lm option to link the math library.
+ * The math library includes pow (to the power of) and M_PI (pi).
+ */
+
+int main()
+{
+    float b, h;
+    scanf("%f%f", &b, &h);
+    printf("%.3f\n", b*h); 
+    return 0;
+}

misc/geometric_workbench/triangle.c

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+#include <stdio.h>
+#include <math.h>
+
+/* Simple program to calculate the area and circumference of a circle.
+ * Remeber to compile with the -lm option to link the math library.
+ * The math library includes pow (to the power of) and M_PI (pi).
+ */
+
+int main()
+{
+    float b, h;
+    scanf("%f%f", &b, &h);
+    printf("%.3f\n", (b*h)/2); 
+    return 0;
+}

misc/text1.c

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+#include <stdio.h>
+
+int main()
+{
+    int c, i, j;
+    scanf("%d%d%d", &c, &i, &j);
+
+    printf("\n%d\n%d\n%d\n", c, i, j);
+
+    return 0;
+}