[base][type] add type limits example

Author: luhuadong

base/type/Makefile

@@ -1,8 +1,14 @@
-CC ?= gcc
-CFLAGS = -O
+CC := gcc
+CFLAGS := -std=gnu17 -Wall -Wextra
+SRCS := $(wildcard *.c)
+EXES := $(SRCS:.c=)
 
-all:
-	$(CC) $(CFLAGS) typesize.c -o typesize
+all: $(EXES)
+
+%: %.c
+	$(CC) $(CFLAGS) -o $@ $^
 
 clean:
-	rm typesize
+	rm -f $(EXES)
+
+.PHONY: all clean

base/type/typelimits.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <float.h>
+
+int main(void)
+{
+    printf("CHAR_BIT       : %d\n", CHAR_BIT);
+    printf("CHAR_MIN       : %d\n", CHAR_MIN);
+    printf("CHAR_MAX       : %d\n", CHAR_MAX);
+    printf("SHRT_MIN       : %d\n", SHRT_MIN);
+    printf("SHRT_MAX       : %d\n", SHRT_MAX);
+    printf("INT_MIN        : %d\n", INT_MIN);
+    printf("INT_MAX        : %d\n", INT_MAX);
+    printf("LONG_MIN       : %ld\n", (long) LONG_MIN);
+    printf("LONG_MAX       : %ld\n", (long) LONG_MAX);
+    printf("SCHAR_MIN      : %d\n", SCHAR_MIN);
+    printf("SCHAR_MAX      : %d\n", SCHAR_MAX);
+    printf("UCHAR_MAX      : %d\n", UCHAR_MAX);
+    printf("USHRT_MAX      : %d\n", (unsigned short) USHRT_MAX);
+    printf("UINT_MAX       : %u\n", (unsigned int) UINT_MAX);
+    printf("ULONG_MAX      : %lu\n", (unsigned long) ULONG_MAX);
+    printf("-------------------------------------\n");
+    printf("FLT_MAX        : %g\n", (float) FLT_MAX);
+    printf("FLT_MIN        : %g\n", (float) FLT_MIN);
+    printf("-FLT_MAX       : %g\n", (float) -FLT_MAX);
+    printf("-FLT_MIN       : %g\n", (float) -FLT_MIN);
+    printf("DBL_MAX        : %g\n", (double) DBL_MAX);
+    printf("DBL_MIN        : %g\n", (double) DBL_MIN);
+    printf("-DBL_MAX       : %g\n", (double) -DBL_MAX);
+    printf("Precision value: %d\n", FLT_DIG );
+
+    return 0;
+}