[IM]: c++学习代码

03.code/00.c/00.test.c

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+/*************************************************************************
+    > File Name: test.c
+    > Author: Apricity
+    > Mail: [email protected] 
+    > Created Time: Tue 24 Nov 2020 06:57:27 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int n;
+	int  res;
+	while(res = scanf("%d", &n) != EOF){
+	getchar();		
+	printf(" has %d digits! res = %d \n",printf("%d",n),res);
+	}
+
+	return 0;
+}

03.code/00.c/00.test2.c

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+/*************************************************************************
+    > File Name: test2.c
+    > Author: Apricity
+    > Mail: [email protected] 
+    > Created Time: Tue 24 Nov 2020 07:28:46 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+#include<string.h>
+int main(int argc,const char* argv[]){
+
+	char str[1000] = {0};
+	int i;
+	while(scanf("%[^\n]s",str) != EOF){
+		getchar();
+		printf("  has  %d digits!\n", printf("%s", str));
+		printf("%s  has  %ld digits!\n", str, strlen(str));
+	}
+	return 0;
+}

03.code/00.c/01.阶乘.c

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+/*************************************************************************
+    > File Name: 1.阶乘.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Tue 01 Dec 2020 07:22:02 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+
+int fac(int i){
+#if 1
+	if(i > 1){
+		return i * fac(i - 1);
+	}
+	return 1;
+#endif
+//	i > 1 ? (return i * fac(i - 1)):(return 1);
+}
+
+
+int main(int argc,const char* argv[]){
+	int n;
+	scanf("%d", &n);
+	printf("%d\n", fac(n));
+	return 0;
+}

03.code/00.c/02.EP45.c

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+/*************************************************************************
+    > File Name: 2.EP45.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Tue 01 Dec 2020 08:45:37 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int Triangle(int n){
+	return n * n(n + 1) / 2;
+}
+int Pentagonal(int n){
+	return n * (3 * n - 1) /2;
+}
+int Hexagonal(int n){
+	return n * (2 * n - 1);
+}
+int binary_search(int (*num)(int), int n, int x){
+	int head = 0;
+	int tail = n - 1;
+	int mid;
+	while (head <= tail) {
+		mid = (head + tail) >> 1;
+		if(num(mid) == x) return mid;
+		if(num(mid) < x) head = mid + 1;
+		else tail = mid - 1;
+	}
+	return -1;
+}
+
+int main(int argc,const char* argv[]){
+	int n=285;
+	while (1) {
+		n++;
+		int val = Triangle(n);
+		if (binary_search(Pentagonal, val, val) == -1) continue; 
+		if(binary_search(Hexagonal, val ,val) != -1) continue;
+
+		printf("%d\n", val);
+	}
+	return 0;
+}
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03.code/00.c/03.printf.c

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+/*************************************************************************
+    > File Name: 3.printf.c
+    > Author: Apricity
+    > Mail: [email protected] 
+    > Created Time: Tue 24 Nov 2020 08:36:52 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int n;
+	char str[1000] = {0};
+# if 0
+	//标准输入
+	scanf("%d", &n);//stdin
+	//标准输出
+	printf("%d\n", n);//stdout stderr
+# endif
+	sprintf(str, "%d.%d.%d.%d", 192, 168, 1, 1);
+	printf("str = %s\n", str);
+	FILE *fout = fopen("output", "w");
+
+	fprintf(stdout, "stdout = %s\n", str);
+	fprintf(stderr, "stdoerr = %s", str);
+	return 0;
+}

03.code/00.c/04.apow.c

@@ -0,0 +1,12 @@
+/*************************************************************************
+    > File Name: apow.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Thu 26 Nov 2020 07:41:53 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+
+	return 0;
+}

03.code/00.c/04.pow3.c

@@ -0,0 +1,15 @@
+/*************************************************************************
+    > File Name: pow.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Thu 26 Nov 2020 07:30:44 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+#include<math.h>
+int main(int argc,const char* argv[]){
+	double n;
+	scanf("%lf", &n);
+	printf("%f", pow(n, 1.0 / 3));
+	return 0;
+}

03.code/00.c/05.good.c

@@ -0,0 +1,27 @@
+/*************************************************************************
+    > File Name: good.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 28 Nov 2020 02:38:36 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int n;
+	while(~scanf("%d", &n)){
+	if (!n) {
+		printf("FOOLISH\n");
+	} else if (n < 60){
+		printf("FALL\n");
+	} else if (n < 75){
+		printf("MEDIUM\n");
+	} else {
+		printf("GOOD\n");
+	}
+	n == 0?(printf("FOOLISH1\n")):(n < 60?(printf("FALL1\n")):( n < 75?(printf("MEDIUM\n")):(printf("GOOD\n")) ));
+	}
+
+
+
+	return 0;
+}

03.code/00.c/06.switch1.c

@@ -0,0 +1,25 @@
+/*************************************************************************
+    > File Name: switch1.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 28 Nov 2020 03:19:45 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int n;
+	scanf("%d", &n);
+	switch(n){
+		case 1: 
+			printf("one ");
+		case 2:
+			printf("two ");
+		case 3:
+			printf("three\n");
+			break;
+		default:
+			printf("error\n");
+			break;
+	}
+	return 0;
+}

03.code/00.c/07.while1.c

@@ -0,0 +1,20 @@
+/*************************************************************************
+    > File Name: while1.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 28 Nov 2020 04:29:31 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int n;
+	n = 1;
+	while (n <= 100) {
+		printf("%d\n", n);
+		n++;
+	}
+	for (int i = 1; i <= 100; i++){
+	printf("%d\n", i);
+	}
+	return 0;
+}

03.code/00.c/09.gcd.c

@@ -0,0 +1,22 @@
+/*************************************************************************
+    > File Name: 9.gcd.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Thu 03 Dec 2020 07:23:41 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int gcd(int a, int b) {
+//	if (b == 0) return a;
+//	if (!b) return a;
+//	return gcd(b, a % b);
+	return (b ? gcd(b, a % b) : a);
+}
+
+int main(int argc,const char* argv[]){
+	int a, b;
+	while(~scanf("%d%d", &a, &b)) {
+		printf("gcd(%d, %d) = %d\n", a, b, gcd(a, b));
+	}
+	return 0;
+}

03.code/00.c/10.EP45.c

@@ -0,0 +1,44 @@
+/*************************************************************************
+    > File Name: 10.EP45.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 05 Dec 2020 07:53:48 AM CST
+ ************************************************************************/
+
+#include<stdio.h>
+typedef long long int1;
+int1 Triangle(int1 n){
+	return n * (n + 1) / 2;
+}
+int1 Pentagonal(int1 n){
+	return n * (3 * n - 1) /2;
+}
+int1 Hexagonal(int1 n){
+	return n * (2 * n - 1);
+}
+int1 binary_search(int1 (*num)(int1), int1 n, int1 x) {
+		int1 head = 0;
+		int1 tail = n - 1;
+		int1 mid;
+		while (head <= tail) {
+			if (mid < 0) printf("error\n");
+			mid = (head + tail) / 2;
+			if (num(mid) == x) return mid;
+			if (num(mid) < x) head = mid + 1;
+			else tail = mid - 1;
+		}
+		return -1;
+}
+int main(int argc,const char* argv[]){
+	int1 n = 285;
+	while (1) {
+		n++;
+		int1 temp = Triangle(n);
+		if (binary_search(Pentagonal, temp, temp) == -1) continue;
+		if (binary_search(Hexagonal, temp, temp) != -1) continue;
+		printf("%lld\n", temp);
+		break;
+
+	}
+	return 0;
+}

03.code/00.c/10.array(1).c

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+/*************************************************************************
+    > File Name: 10.array.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 05 Dec 2020 06:33:53 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int arry[100] = {0};
+	for (int i = 1; i <= 100; i++) {
+		printf("array[%d] = %d\n", i - 1, arry[i - 1]);
+	}
+	return 0;
+}

03.code/00.c/10.array.c

@@ -0,0 +1,15 @@
+/*************************************************************************
+    > File Name: 10.array.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 05 Dec 2020 06:33:53 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+int main(int argc,const char* argv[]){
+	int arry[100] = {0};
+	for (int i = 1; i <= 100; i++) {
+		printf("array[%d] = %d\n", i - 1, arry[i - 1]);
+	}
+	return 0;
+}

03.code/00.c/11.prime.c

@@ -0,0 +1,27 @@
+/*************************************************************************
+    > File Name: 11.prime.c
+    > Author: Apricity
+    > Mail:  
+    > Created Time: Sat 05 Dec 2020 07:28:24 PM CST
+ ************************************************************************/
+
+#include<stdio.h>
+#define max_n 100
+
+int prime[max_n + 5] = {0};
+void init() {
+	for (int i = 2; i <= max_n; i++) {
+		if (prime[i]) continue;
+		prime[++prime[0]] = i;
+		for (int j = i * i; j <= max_n; j += i) {
+				prime[j] = 1;
+		}
+	}
+}
+int main(int argc,const char* argv[]){
+	init();
+	for (int i = 2; i <= prime[0]; i++){
+		printf("%d\n", prime[i]);
+	}
+	return 0;
+}