third exercise

1-3.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main(){
+  float fahr, celsius;
+  float lower, upper, step;
+
+  lower = 0;      /* lower limit of temperature scale */
+  upper = 300;    /* upper limit */
+  step = 20;      /* step size */
+
+  fahr = lower;
+  printf("celsius fahrenheit\n");
+  while (fahr <= upper) {
+    celsius = (5.0/9.0) * (fahr-32.0);
+    printf("%7.0f %10.1f\n", fahr, celsius);
+    fahr = fahr + step;
+  }
+}