终于明白了
sum+=flag*i //从1开始赋值 sum=0+1*1=1
flag=-1*flag // flag变成-1
sum+=flag*i //sum=1+(-1*2)=-1
flag=-1*flag // flag变成1
sum+=flag*i //sum=-1+(1*3)=2
flag=-1*flag //flag变成-1
。。。
我一直以为flag只要赋值就没事了。。。。。。。
sum+=flag*i //从1开始赋值 sum=0+1*1=1
flag=-1*flag // flag变成-1
sum+=flag*i //sum=1+(-1*2)=-1
flag=-1*flag // flag变成1
sum+=flag*i //sum=-1+(1*3)=2
flag=-1*flag //flag变成-1
。。。
我一直以为flag只要赋值就没事了。。。。。。。
2015-04-24
#include <stdio.h>
int main()
{
int number=200;
int year=2014;
do{
year++;
number=number*1.2 ; //这里是不是应该写点什么?
}while(number<1000); //这里好像缺点什么
printf("到%d年招工规模突破1000人\n", year);
return 0;
}
int main()
{
int number=200;
int year=2014;
do{
year++;
number=number*1.2 ; //这里是不是应该写点什么?
}while(number<1000); //这里好像缺点什么
printf("到%d年招工规模突破1000人\n", year);
return 0;
}
2015-04-24
#include <stdio.h>
int main()
{
int x = 0;
printf("x=%d\n",x++);
printf("x=%d\n",++x);
return 0;
}
int main()
{
int x = 0;
printf("x=%d\n",x++);
printf("x=%d\n",++x);
return 0;
}
2015-04-24
#include <stdio.h>
int main()
{
int x = 0;
printf("%d\n",x++);
printf("%d\n",++x);
return 0;
}
int main()
{
int x = 0;
printf("%d\n",x++);
printf("%d\n",++x);
return 0;
}
2015-04-24
#include <stdio.h>
int main()
{
int a,b,c,d;
double result;
a = 1;
b = 2;
c = 3;
d = 4;
result = a *b*(c+d); //在这里体验哦~
printf("%f\n", result);
return 0;
int main()
{
int a,b,c,d;
double result;
a = 1;
b = 2;
c = 3;
d = 4;
result = a *b*(c+d); //在这里体验哦~
printf("%f\n", result);
return 0;
2015-04-24
#include <stdio.h>
int main()
{
double num = 2.5; //定义浮点型变量num并赋值为2.5
printf("num的整数部分是%d\n", (int)num);
return 0;
int main()
{
double num = 2.5; //定义浮点型变量num并赋值为2.5
printf("num的整数部分是%d\n", (int)num);
return 0;
2015-04-24
#include <stdio.h>
int main()
{
char c = 'a';
int n = c; //将c赋值给n
float f = c; //将c赋值给f
double d = c; //将c赋值给d
printf("%d\n",n);
printf("%f\n",f);
printf("%lf\n",d);
return 0;
int main()
{
char c = 'a';
int n = c; //将c赋值给n
float f = c; //将c赋值给f
double d = c; //将c赋值给d
printf("%d\n",n);
printf("%f\n",f);
printf("%lf\n",d);
return 0;
2015-04-24
#include <stdio.h>
int main()
{
char c = 'a';
int n = c; //将c赋值给n
float f = n; //将c赋值给f
double d = f; //将c赋值给d
printf("%d\n",n);
printf("%f\n",f);
printf("%lf\n",d);
return 0;
int main()
{
char c = 'a';
int n = c; //将c赋值给n
float f = n; //将c赋值给f
double d = f; //将c赋值给d
printf("%d\n",n);
printf("%f\n",f);
printf("%lf\n",d);
return 0;
2015-04-24
#include <stdio.h>
int main(){
int age = 18;
float height = 1.85;
char unit = 'm';
printf("小明今年%d岁\n", age);
printf("小明身高%fm\n", height, unit);
printf("小明现在在慕课网上学习IT技术%c");
return 0;
}
int main(){
int age = 18;
float height = 1.85;
char unit = 'm';
printf("小明今年%d岁\n", age);
printf("小明身高%fm\n", height, unit);
printf("小明现在在慕课网上学习IT技术%c");
return 0;
}
2015-04-24