7 files changed, 160 insertions, 0 deletions
diff --git a/copier.c b/copier.c
new file mode 100644
index 0000000..eeade8e
--- /dev/null
+++ b/copier.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+/* Copy input to output; 1st version */
+//main() {
+//    int c; 
+//
+//    c = getchar();
+//    
+//    while (c != EOF) {
+//        putchar(c);
+//        c = getchar();
+//    }
+//}
+
+/* Copy input to output; 2nd version */
+main() {
+    int c;
+
+    while ((c = getchar()) != EOF) {
+        putchar(c);
+    }
+}
+
+//main() {
+//    printf("%d", EOF);
+//    getchar();
+//    printf("%d", getchar());
+//    printf("%d", getchar());
+//}
diff --git a/counter.c b/counter.c
new file mode 100644
index 0000000..a1b9927
--- /dev/null
+++ b/counter.c
@@ -0,0 +1,29 @@
+#include<stdio.h>
+
+/* 
+ * Count characters in input; 1st version 
+ */
+//main() {
+//    long nc;
+//
+//    nc = 0;
+//
+//    while (getchar() != EOF)
+//        ++nc;
+//
+//
+//    printf("%ld\n", nc);
+//}
+
+/*
+ * Count characters in input; 2nd version
+ */
+main() {
+    long nc;
+
+
+    for (nc = 0; getchar() != EOF; ++nc)
+        ;
+
+    printf("%ld\n", nc);
+}
diff --git a/ctof.c b/ctof.c
new file mode 100644
index 0000000..7e2cbef
--- /dev/null
+++ b/ctof.c
@@ -0,0 +1,24 @@
+#include<stdio.h>
+
+/*
+ * Print Celcius-Fahrenheit table for celcius = 0, 20, ... 300.
+ */
+main() {
+    float fahr, celcius;
+    int lower, upper, step;
+
+    lower = 0;      // lower limit of temperature table
+    upper = 300;    // upper limit of temperature table
+    step = 20;      // step size
+
+    celcius = lower;
+
+    printf("%3s %6s\n", "C", "F");
+
+    while (celcius <= upper) {
+        fahr = (9.0 / 5.0) * celcius + 32.0;
+        printf("%3.0f %6.1f\n", celcius, fahr);
+        celcius = celcius + step;
+    }
+}
+
diff --git a/ftoc.c b/ftoc.c
new file mode 100644
index 0000000..2efa6f7
--- /dev/null
+++ b/ftoc.c
@@ -0,0 +1,32 @@
+#include<stdio.h>
+
+#define     LOWER   0       // lower limit of table 
+#define     UPPER   300     // upper limit of table 
+#define     STEP    20      // step size
+
+/*
+ * Print Fahrenheit-Celcius table for fahr = 0, 20, ... 300.
+ */
+main() {
+    float fahr, celcius;
+    int lower, upper, step;
+
+    lower = 0;      // lower limit of temperature table
+    upper = 300;    // upper limit of temperature table
+    step = 20;      // step size
+
+    fahr = lower;
+
+    printf("%3s %6s\n", "F", "C");
+
+    //    while (fahr <= upper) {
+    //        celcius = 5.0 / 9.0 * (fahr - 32.0);
+    //        printf("%3.0f %6.1f\n", fahr, celcius);
+    //        fahr = fahr + step;
+    //    }
+
+    for (fahr = UPPER; fahr >= LOWER; fahr = fahr - STEP) {
+        printf("%3.0f %6.1f\n", fahr, (5.0 / 9.0) * (fahr - 32));
+    }
+}
+
diff --git a/hello.c b/hello.c
new file mode 100644
index 0000000..b1ad928
--- /dev/null
+++ b/hello.c
@@ -0,0 +1,8 @@
+#include<stdio.h>
+
+main() {
+    printf("hello, ");
+    printf("world.");
+    printf("\n");
+}
+ 
diff --git a/line_counter.c b/line_counter.c
new file mode 100644
index 0000000..0447aa7
--- /dev/null
+++ b/line_counter.c
@@ -0,0 +1,16 @@
+#include<stdio.h>
+
+/*
+ * Count lines in input
+ */
+main() {
+    int c, nl;
+
+    nl = 0;
+
+    while ((c = getchar()) != EOF)
+        if (c == '\n')
+            ++nl;
+
+    printf("%d\n", nl);
+}
diff --git a/whitespace_counter.c b/whitespace_counter.c
new file mode 100644
index 0000000..ea441e2
--- /dev/null
+++ b/whitespace_counter.c
@@ -0,0 +1,22 @@
+#include<stdio.h>
+
+/*
+ * Count whitespace in input
+ */
+main() {
+    int c, n_whitespace;
+
+    n_whitespace = 0;
+
+    while ((c = getchar()) != EOF) {
+        if (c == '\n')
+            ++n_whitespace;
+        if (c == '\t')
+            ++n_whitespace;
+        if (c == ' ')
+            ++n_whitespace;
+    }
+
+
+    printf("%d\n", n_whitespace);
+}