Add valueTable.c

Author: Till Johanndeiter

valueTable.c

@@ -0,0 +1,74 @@
+#include <ctype.h>
+#include <f2fs_fs.h>
+#include<math.h>
+
+#define INVALID_INPUT "Invalid Argument combination! Enter function [-cos -sin -tan] start end and offset\n"
+
+bool isValidArgumentCombination(int argc, const char *const *argv);
+
+double (*getFunction(const char *const *argv))(double);
+
+void printValueTable(const char *const *argv);
+
+bool isInvalidFktArgument();
+
+int main(int argc, char const *argv[]) {
+
+    if (isValidArgumentCombination(argc, argv)) {
+        printValueTable(argv);
+    } else {
+        printf(INVALID_INPUT);
+    }
+
+    return 0;
+}
+
+void printValueTable(const char *const *argv) {
+
+    double (*trigonometricFkt)(double) = getFunction(argv);
+    if (isInvalidFktArgument(trigonometricFkt)) {
+        printf(INVALID_INPUT);
+    } else {
+        float start = atof(argv[2]);
+        float end = atof(argv[3]);
+        float offset = atof(argv[4]);
+
+        char fktNameBuff[4];
+        memcpy(fktNameBuff, &argv[1][1], 3);
+        fktNameBuff[3] = '\0';
+
+        while (start <= end) {
+            printf("Value for %s(%f.10)  : %f.10\n", fktNameBuff, start, trigonometricFkt(start));
+            start += offset;
+        }
+    }
+}
+
+double (*getFunction(const char *const *argv))(double) {
+
+    double (*trigonometricFkt)(double) = NULL;
+
+    if (strcmp("-cos", argv[1]) == 0) {
+        trigonometricFkt = cos;
+    } else if (strcmp("-sin", argv[1]) == 0) {
+        trigonometricFkt = sin;
+    } else if (strcmp("-tan", argv[1]) == 0) {
+        trigonometricFkt = tan;
+    }
+    return trigonometricFkt;
+}
+
+bool isInvalidFktArgument(double (*trigonometricFkt)(double)) {
+    return trigonometricFkt == NULL;
+}
+
+bool isValidArgumentCombination(int argc, const char *const *argv) {
+    return argc > 1
+           && isdigit(*argv[2])
+           && isdigit(*argv[3])
+           && isdigit(*argv[4]);
+}
+
+float ownTan(float f) {
+    return f * M_PI / 180;
+}