diff --git a/03/3/3.c b/03/3/3.c
index acae059..dfab184 100644
--- a/03/3/3.c
+++ b/03/3/3.c
@@ -2,44 +2,36 @@
 
 int number(int num){
 	
-	int a = num % 3,b = num % 5,c = num % 7;
+	int a = num % 3,b = num % 5,c = num % 7,first = 1;
 	
-	if (a == 0) {
-		if (b == 0) {
-			if (c == 0) {
-				printf("Can be divisible by 3,5,7.");
+	if (a == 0 || b == 0 || c == 0) {
+	    printf("Can be divisible by ");
+	    if (a == 0) 
+	    	first = 0;
+			printf("3");
+	    if (b == 0)
+		    if (first) {
+		        printf("5");
+		        first = 0;
+		    }
+		    else
+		    	printf(",5");
+		// 防止编译器编译时输出警告
+		else a=a;
+		if (c == 0)
+			if (first) {
+				printf("7");
+				first = 0;
 			}
-			else {
-				printf("Can be divisible by 3,5.");
-			}
-		}
-		else {
-			if (c == 0) {
-							printf("Can be divisible by 3,7.");
-			}
-			else {
-				printf("Can be divisible by 3.");
-			}
-		}
+			else
+				printf(",7");
+		// 防止编译器编译时输出警告
+		else a=a;
 	}
 	else {
-		if (b == 0) {
-			if (c == 0) {
-				printf("Can be divisible by 5,7.");
-			}
-			else {
-				printf("Can be divisible by 5.");
-			}
-		}
-		else {
-			if (c == 0) {
-				printf("Can be divisible by 7.");
-			}
-			else {
-				printf("Can not be divisible by 3,5,7.");
-			}
-			}
+	    printf("Can not be divisible by 3,5,7");
 	}
+	printf(".");
 	return 0;
 }