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0ur5ay / 百钱百鸡问题

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百钱买百鸡问题：古代数学家在《算经》中有一道题：“鸡翁一，值钱五；鸡母一，值钱三；鸡雏三，值钱一。百钱买百鸡，问鸡翁、母、雏各几何？”意思是：公鸡5文钱买1只，母鸡3文钱买1只，小鸡1文钱买3只。用100文钱，买100只鸡，问公鸡、母鸡、小鸡各有几只？
1 #include <stdio.h>
2 int main() {
3 int i, j, k;
4 for (i = 0; i <= 20; i += 1) {
5 for (j = 0; j <= 33; j += 1) {
6 for (k = 0; k <= 100 - j - i; k += 1) {
7 if (k % 3 != 0)
8 continue;
9 if (i + j + k == 100 && i * 5 + j * 3 + k / 3 == 100)
10 printf("%d %d %d\n", i, j, k);

0ur5ay / judge

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判断字符
1 #include<stdio.h>
2 int main(){
3 char ch;
4 scanf("%c", &ch);
5 if ((ch<=90&&ch>=65) || (ch<=122&&ch>=97)) {
6 printf("alpha");
7 } else if(ch>='0'&&ch<='9'){
8 printf("numeric");
9 } else{
10 printf("other");

0ur5ay / 1.c

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1 #include<stdio.h>
2 int main {
3 printf("hello");
4 return 0;
5 }
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