#include <stdio.h>
/*
输入输出函数的学习
函数的调用
2017.05.25 soulsjie
*/
//输入连个数字求最大值
void main(){int Max( int a ,int b);             //在C语言中函数调用之前先声明int shuzi1 , shuzi2 , jieguo ,xuanze;printf("请输入数字1：\n");          //输出函数scanf("%d",&shuzi1);                //输入函数printf("请输入数字2：\n");scanf("%d",&shuzi2);printf("-----请选择计算方式:-----\n");printf("-------1.求最大值:-------\n");printf("-------2.求 和:----------\n");printf("-------3.求最小值:-------\n");printf("-------4.求差值:---------\n");printf("-------5.求乘积:---------\n");printf("-------6.求平均数:-------\n");scanf("%d",&xuanze);                //用户输入选择if (xuanze==1){jieguo=Max(shuzi1,shuzi2);    }if (xuanze==2){jieguo=Sum(shuzi1,shuzi2);   }if (xuanze==3){jieguo=Mix(shuzi1,shuzi2);   }if (xuanze==4){jieguo=Cha(shuzi1,shuzi2);   }if (xuanze==5){jieguo=Chen(shuzi1,shuzi2);  }if (xuanze==6){jieguo=Avg(shuzi1,shuzi2);   }printf("您输入的数字1是：%d\n",shuzi1);printf("您输入的数字2是：%d\n",shuzi2);printf("结果：%d\n",jieguo);
}int Max(int a ,int b){                 //Max函数int c;if(a>b)c=a;else c=b;return(c);
}int  Sum(int a,int b){                 //Sum函数int c;c=a+b;return(c);}int Mix(int a ,int b){                  //Mix函数int c;if(a>b)c=b;else c=a;return(c);
}int Cha(int a ,int b){                 //Cha函数求差int c;if(a>b)c=a-b;else c=b-a;return(c);
}int Chen(int a ,int b){                    //Chen函数int c;c=a*b;return(c);
}int Avg(int a ,int b){                 //Chu函数int c;c=(a+b)/2;return(c);
}