if语句比较

1.
#include
int main()
{
float shuxue, yuwen ,waiyu ,huaxue,zongfen;
int select;
shuxue=138;
yuwen=56;
waiyu=98;
huaxue=100;
zongfen=394; 
scanf("%d",&select);
if (select==1)
    {

printf("shuxue is %.2f\n",shuxue);
return 0;

}
else if(select==2)
{

printf("yuwen  is %.2f\n",yuwen);
return 0;
}
else if(select==3)
    {

printf("waiyu is %.2f \n",waiyu);
return 0;

}
else if(select==4)
{
        
printf(" huaxueis %.2f \n",huaxue);
return 0;
}
else
    {
   
printf("zongfen is %.2\n",zongfen);
return 0;
 
}


    return 0;


2.
#include
int main()
{
    float shuxue,yuwen ,waiyu,huaxue,zongfen;
int select;
shuxue=138;
yuwen=58;
waiyu=98;
huaxue=100;
zongfen=138+58+98+100;
scanf("%d",&select);
if (select==1)
    {
printf("数学 is %.2f\n",shuxue);
return 0;
}
else if(select==2)
    {
printf(" 语文 is %.2f\n",yuwen);
return 0;
}
else if(select==3)
{
         printf("外语 is %.2f\n",waiyu);
return 0;
}
else if(select==4)
{
    printf("化学 is %.2f\n",huaxue);
return 0;
}
else 
{
printf("总分 is %.2f  \n",zongfen);
}
return 0;
}‘
1命令

2命令