第七讲：分支结构程序体验

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/*Exercise#1:difference*/int main(){    int a,b,t,diff;    scanf("%d %d",&a,&b);    if(a<b)    {        t=a;        a=b;        b=t;    }    diff=a-b;    printf("The difference is %d\n",diff);    return 0;}<pre name="code" class="html"><img src="http://img.blog.csdn.net/20150406044806016?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvWXVlbmFjaGVu/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);" alt="" />

*Exercise#2: find largest number*/int main(){    int a,b,c,t;    scanf("%d %d %d",&a,&b,&c);    if(a<b)    {        t=a;        a=b;        b=t;    }    if(a<c)    {        a=c;    }    printf("The largest number is %d\n",a);}

<img src="http://img.blog.csdn.net/20150406044731699?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvWXVlbmFjaGVu/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />

/*Exercise#3: salary*//*int main(){    int a,w;    scanf("%d",&a);    if(a<40)    {       w=a*20;    }    else    {        w=40*20+(a-40)*30;    }    printf("The wage is %d\n",w);    return 0;}

总结：单分支结构和双分支结构

a=t,a=b,b=t 的运用

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