The third job analysis

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One 、

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About C The correct language keyword is ：( )
A. Keywords can be created by yourself
B. Keywords cannot be created by themselves
C. Keyword can be used as variable name
D.typedef Not a keyword

B

I've talked about it before , Keywords cannot be created by yourself , It is c Language itself has , It's built in , Nor can it be used as a variable name , There will be conflict
typedef It's keywords , It is the function of type renaming , Rename some complex types with a simple name

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Two 、

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Use in switch The keyword in the language does not contain which ？( )
A.continue
B.break
C.default
D.case

A

switch Is used to select , That is, branch statements ,break Is to jump out of the choice ,default It means that the input number is not within the optional range , Will jump to its corresponding place and execute its selection ,case Is to select every choice in the statement ,case 1: Namely choice 1,case 2: Namely choice 2, You can rearrange the order .

however continue It's used in the loop , The effect is to end this cycle , The following code is no longer executed , Skip to the next cycle

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3、 ... and 、

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Which of the following is not a keyword ：（ ）
A.int
B.struct
C.define
D.continue

C

In the keywords learned before , Only define Not a keyword
But we often use it .
For example, reference header file ,#define Defined identifier constant ,#define Defined macros, etc .
It is a preprocessing instruction , Instructions designed for preprocessing , Let's talk about it later

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Four 、

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BC18- Calculating division with remainder
Calculating division with remainder

The result of Xiao Ben ：

#include<stdio.h>

int main()
{
    
    int a=0;
    int b=0;
    int c=0;
    int d=0;
    scanf("%d %d",&a,&b);
    c=a/b;
    d=a%d;
    printf("%d %d",c,d);
    
    return 0;
}

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5、 ... and 、

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BC13-ASCII code
ASCII code

The result of Xiao Ben ：

#include<stdio.h>
int main()
{
    
    int a[12]={
    73, 32, 99, 97, 110, 32, 100, 111, 32, 105, 116 , 33};
    int i=0;
    while (i<12)
    {
    
        printf("%c",a[i]);
        i++;
    }
return 0;
}

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6、 ... and 、

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BC14- Date of birth input output
Date of birth input output

The result of Xiao Ben ：

#include<stdio.h>

int main()
{
    
    int year = 0;
    int mouth = 0;
    int date = 0;
    // Input 
    scanf("%4d%02d%02d",&year,&mouth,&date);
    // Output 
    printf("year=%4d\nmonth=%02d\ndate=%02d\n",year,mouth,date);
    return 0;
}

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7、 ... and 、

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BC11- Input and output of students' basic information
Input and output of students' basic information

The result of Xiao Ben ：

#include<stdio.h>
 
int main()
{
    
    int a = 0;
    float b = 0.0;
    float c = 0.0;
    float d = 0.0;
 
    scanf("%d;%f,%f,%f", &a, &b, &c, &d);
    printf("The each subject score of No. %d is %.2f, %.2f, %.2f.",a,b,c,d);
    return 0;
}

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8、 ... and 、

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BC9-printf The return value of the function
printf The return value of the function

The result of Xiao Ben ：

#include <stdio.h>
 
int main() 
{
    
    // Use ret preservation printf The return value of 
    int ret = printf("Hello world!");
    printf("\n");
    printf("%d\n", ret);
    return 0;
}

The third job parsing is over