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Task/Nth/C/nth.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+
+char* addSuffix(int num, char* buf, size_t len)
+{
+    char *suffixes[4] = { "th", "st", "nd", "rd" };
+    int i;
+
+    switch (num % 10)
+    {
+        case 1 : i = (num % 100 == 11) ? 0 : 1;
+	         break;
+        case 2 : i = (num % 100 == 12) ? 0 : 2;
+                 break;
+        case 3 : i = (num % 100 == 13) ? 0 : 3;
+                 break;
+        default: i = 0;
+    };
+
+    snprintf(buf, len, "%d%s", num, suffixes[i]);
+    return buf;
+}
+
+int main(void)
+{
+    int i;
+
+    printf("Set [0,25]:\n");
+    for (i = 0; i < 26; i++)
+    {
+        char s[5];
+        printf("%s ", addSuffix(i, s, 5));
+    }
+    putchar('\n');
+
+    printf("Set [250,265]:\n");
+    for (i = 250; i < 266; i++)
+    {
+        char s[6];
+        printf("%s ", addSuffix(i, s, 6));
+    }
+    putchar('\n');
+
+    printf("Set [1000,1025]:\n");
+    for (i = 1000; i < 1026; i++)
+    {
+        char s[7];
+        printf("%s ", addSuffix(i, s, 7));
+    }
+    putchar('\n');
+
+    return 0;
+}