学习devilc++的日常第二弹
敲敲敲敲敲敲代码
1.a++,++a，a--,--a。
2.scanf

①#include <stdio.h>
int main()
{
int a = 1;

printf(" a= %d\n", ++a);
printf(" a= %d\n", a);
return 0;
}
②#include <stdio.h>
int main()
{
int a = 10,b = 20,c = 30,d = 40;
int a1 = ++a,b1 = b++,c1 = --c,d1 = d--;

printf(" a= %d,a1= %d\n", a,a1);
printf(" b= %d,b1= %d\n", b,b1);
printf(" c= %d,c1= %d\n", c,c1);
printf(" d= %d,d1= %d\n", d,d1);

return 0;
}
③#include <stdio.h>
int main()
{
printf("$$$$$$\n");
int age = 18;
printf("我今年%d岁了\n",age);
int a1 = 1;
int a2 = 2;
int a3 = 3;
int a4 = 4;

printf("%-9d,%-9d,%-9d,%-9d\n",a1,a2,a3,a4);

return 0;
}

④#include <stdio.h>
int main()
{
double f = 888.923672;

printf("f: %.10f %.20f %.30f\n",f,f,f);

return 0;
}
⑤#include <stdio.h>

int main()
{
int a = 0,b = 0,c = 0,d = 0;
printf("please input a number:");
scanf("%d,%d", &a, &b);//输入两个整数并分别赋值给a,b

c = a + b;
printf("c = %d\n",c);

return 0;
}