fix: compilation errors after api drift

examples/00_example_template/example.c

@@ -9,6 +9,7 @@ int main()
     uint64_t* seed = malloc(sizeof(uint64_t));
     *seed = 1000; // xorshift can't start with 0
 
+    // ...
 
     free(seed);
 }

examples/07_ci_beta/example.c

@@ -14,7 +14,7 @@ int main()
     uint64_t* seed = malloc(sizeof(uint64_t));
     *seed = 1000; // xorshift can't start with 0
 
-		struct c_i beta_1_2_ci_90 = get_90_confidence_interval(beta_1_2_sampler, seed);
+		ci beta_1_2_ci_90 = get_90_confidence_interval(beta_1_2_sampler, seed);
 		printf("90%% confidence interval of beta(1,2) is [%f, %f]\n", beta_1_2_ci_90.low, beta_1_2_ci_90.high);
 		
 		free(seed);

examples/09_burn_10kg_fat/example.c

@@ -33,7 +33,7 @@ int main()
         result[i] = sample_minutes_per_day_jumping_rope_needed_to_burn_10kg(seed);
     }
 
-    printf("How many minutes per day do I have to jump rope to lose 10kg of fat by the end of the year?\n");
+    printf("## How many minutes per day do I have to jump rope to lose 10kg of fat by the end of the year?\n");
     printf("Mean: %f\n", array_mean(result, n));
     printf("A few samples: [ ");
     for (int i = 0; i < 9; i++) {
@@ -41,8 +41,10 @@ int main()
     }
     printf("... ]\n");
 
-    struct c_i c_i_90 = get_90_confidence_interval(sample_minutes_per_day_jumping_rope_needed_to_burn_10kg, seed);
-    printf("90%% confidence interval: [%f, %f]\n", c_i_90.low, c_i_90.high);
+    ci ci_90 = get_90_confidence_interval(sample_minutes_per_day_jumping_rope_needed_to_burn_10kg, seed);
+    printf("90%% confidence interval: [%f, %f]\n", ci_90.low, ci_90.high);
+
+
 
     free(seed);
 }