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practices/c/level0/C0

@@ -0,0 +1,8 @@
+# include <stdio.h>
+
+int main()
+{
+	printf("Hello World! I'm 李帅锋！\n");
+
+	return 0;
+}

practices/c/level0/C1

@@ -0,0 +1,23 @@
+# include <stdio.h>
+
+int main()
+{
+	int input;
+	scanf("%d",&input);
+
+	if(input>0){
+		if(input%2==0){
+			printf("是正数而且是偶数\n");
+		}
+		else {
+			printf("是正数但不是偶数\n");
+		}
+	}
+	else if(input==0){
+		printf("既不是正数也不是负数\n");
+	}
+	else{
+		printf("是负数\n");
+	}
+	return 0;	
+}

practices/c/level1/p01_runningLetter/p01

@@ -0,0 +1,26 @@
+# include<stdio.h>
+# include<windows.h>
+
+int main()
+{
+	int i,j;
+	for(i=0;i<12;i++){
+		for(j=0;j<i;j++){
+			printf(" ");
+		}
+		Sleep(100);
+		printf("R");
+		system("cls");
+	}
+
+	for(i=12;i>0;i--){
+		for(j=0;j<i;j++){
+			printf(" ");
+		}
+		Sleep(100);
+		printf("R");
+		system("cls");
+	}
+
+	return 0;
+ } 

practices/c/level1/p02_isPrime/p02

@@ -0,0 +1,24 @@
+# include<stdio.h>
+
+int main()
+{
+	int i,x = 0;
+	int infox=-1;
+	scanf("%d",&x);
+
+	for( i=2;i<x;i++){
+		if(x%i==0){
+			infox++;
+		}
+	}
+
+	}
+	if(infox==-1){
+		printf("是素数\n");
+	}
+	else {
+		printf("不是素数\n");
+	}
+
+	return 0;
+}

practices/c/level1/p04_ narcissus/p04

@@ -0,0 +1,19 @@
+# include <stdio.h>
+# include <math.h>
+
+int main()
+{
+	int number = 153;
+
+	for(number=100;number<1000;number++){
+
+	int number1 = number/100;
+	int number2 = (number%100)/10; 
+	int number3 = number%10;
+		if(number==pow(number1,3)+pow(number2,3)+pow(number3,3)){
+			printf("%d\n",number);
+		}
+	}
+
+	return 0;
+ } 

practices/c/level1/p05_allPrimes/p05

@@ -0,0 +1,21 @@
+# include<stdio.h>
+
+
+int main()
+{
+	int num;
+	int fox = 0;
+	for(num=2;num<2000;num++){
+		for(int i=2;i<num;i++){
+			if(num%i==0){
+				fox++;
+			} 
+		}
+		if(fox==0){
+			printf("%d\n",num);
+		}
+		fox=0;
+	}
+
+	return 0;
+}