先看代码：

#include 
     
      #define INTDEMO 250int main(){    const double DOUBLEDEMO = 3.14159;    const short SHORTDEMO = 0xFFFF;    printf("%2d\n",INTDEMO);    printf("%10d\n", INTDEMO);    printf("%-10d\n",INTDEMO);    printf("%f\n", DOUBLEDEMO);    printf("%Lf\n", DOUBLEDEMO);    printf("%4.2Lf\n", DOUBLEDEMO);    printf("%10.3Le\n", DOUBLEDEMO);    printf("%10.3Lf\n", DOUBLEDEMO);    printf("%010.3Lf\n", DOUBLEDEMO);    printf("%+010.3Lf\n", DOUBLEDEMO);    printf("%c", SHORTDEMO);    float f_num = 3.0;    double d_num = 3.0;    int i_num = 2000000000;    long l_num = 1234567890;    printf("%.1g %.1g %.1g %.1g", f_num, d_num, i_num, l_num);    printf("%ld %ld", i_num, l_num);    printf("%ld %ld %ld %ld", f_num, d_num, i_num, l_num);    printf("I""Love", "Mark");    getchar();        return 0;}
     

 

 

运行得出：