Pace 1 (PrimeNumber & MultTable & LeapYear)

查找并输出100-200之间的素数

#include <stdio.h>#include <math.h>int main(){int i, j, k;for (i = 101; i <= 200; i=i+2){k = sqrt(i);for (j = 2; j <= k; j++)if (i%j == 0)break;if (j>=k+1){printf("%8d", i);}}system("pause");return 0;}

打印九九乘法表

#include <stdio.h>int main(){int i, j, k = 0;for (i = 1; i <= 9; i++){for (j = 1; j <= i; j++){k = i*j;printf("%d*%d=%2d  ", i, j, k);}printf("\n");}system("pause");return 0;}

查找并输出1000-2000之间的闰年

#include <stdio.h>int main(){int y,l=0;for (y = 1000; y <= 2000; y++){if ((y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)){printf("%d ", y);l++;}if (l % 20 == 0)printf("\n");}system("pause");return 0;}

由于使用VS2013，程序运行后显示屏总是一闪而过，所以代码后加了system("pause");