Scanf statement usage record, scanf statement usage

Scanf statement usage record, scanf statement usage

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Format Character Description

% D input Integer Data

% F Input Single-precision floating point data

% Lf Double Precision Floating Point Data (float type available)

% C enter a character

% S enter a string of characters

% O input an octal integer

% Enter % characters

 

(1) Use of % d

1 #include "stdio.h" 2 int main(void) 3 { 4     int a,b,c; 5     scanf("%d%d%d",&a,&b,&c); 6     printf("%d,%d,%d/n",a,b,c);7     return 0;8 }  

Input Format:

Abc, a B c, etc.

Description: Space, tab, and newline characters can be added to letters a, B, and c.

1 #include"stdio.h" 2 int main(void) 3 { 4     int a,b,c;5     scanf("%d,%d,%d",&a,&b,&c);6     printf("%d,%d,%d/n",a,b,c);7     return 0;8 }  

Input Format:

A, B, c or a, B, c, etc.

Description: The rule is basically the same as in the previous example, but note that a "," must be added after each letter ",".

1 #include "stdio.h" 2 int main(void) 3 { 4     int a,b,c;5     scanf("%d    %d%d",&a,&b,&c);6     printf("%d,%d,%d/n",a,b,c);7     return 0;8 }  

Input Format:

Abc, a B c, etc.

Description: Adding space and tab to % d and % d in the scanf statement is equivalent to % d.

(2) Use of % c

Note: % C can read space, tab, and newline.

1 #include<stdio.h>2 int main()3 {4     char a, b, c;5     scanf("%c%c%c", &a, &b, &c);6     printf("%c%c%c", a, b, c);7     return 0;8 }

Input Format:

Abc

Description: The input data cannot contain any characters including space, tab, or newline.

1 #include<stdio.h>2 int main()3 {4     char a, b, c;5     scanf("%c %c%c", &a, &b, &c);6     printf("%c%c%c", a, b, c);7     return 0;8 }

Input Format:

A bc or

Bc

Description: If tab or space is added between % c and % c in the scanf statement, space, tab, newline (between % d and % c) can be added during input ).

1 #include<stdio.h>2 int main()3 {4     char a, b, c;5     scanf("%c,%c%c", &a, &b, &c);6     printf("%c%c%c", a, b, c);7     return 0;8 }

Input Format:

A, bc

Description: All characters except tab, space, and newling must be input. Otherwise, garbled characters may occur.

(3) Use of % s

Note: % S cannot read space, tab, or newline.

1 #include<stdio.h>2 int main()3 {4     char a[10],b[10];5     scanf("%s %s",a,b);6     printf("%s%s", a,b);7     return 0;8 }

Input Format:

I You or I

You

Description: % S cannot read space, tab, newline, and % s. The three characters entered between % s and % s are the same as % s.

Note: % S and % s do not add any characters except space and tab. To add characters, use space or tab interval.

Example: % S

% S

 

1 #include<stdio.h>2 int main()3 {4     char a[10], b[10], c;5     scanf("%s %c%s",a,&c,b);6     printf("%s%s%c", a,b,c);7     return 0;8 }

Input Format:

A B c or a bc or

Bc

Description: % C is similar to % s. When % s is input, a tab, space, or newline can be added. You can also enter a string of characters (the first character of this string is given to c, the remaining characters are given to B ). If no tab or space exists between % s and % c, c can only get '\ n'. If yes, tab, space, and newline can be added when input.

Additional note: % S and % d are mixed. You can use space, tab, or newline to separate data during input, but they cannot be separated.

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