Algorithm Programming question Language notes

1. Power

 
# Include <math. h>//Header filePow (A, B );//A ^ B
 

 

2. bool

 
# Include <stdbool. h>//Header files need to be added when bool type is used in C.
 

 

3. String operations

# Include <String. H>//Header file CharA [20], B [20]; Strcpy (A, B );//Copy string B toLength= Strlen ();//LengthStrcmp (A, B );//String comparison: Compares the characters in a and B one by one, and continues to compare the next character. The operation is terminated at the same time and the difference size is returned.
 

 

4. Fast sorting in C library functions

 # include 
    
    ///  
     header file  
     int  num [
     100  
    ];  
     int  CMP (
     const  
     void  * a, 
     const  
     void  * B) 
    ///  
     comparison functions  
    { 
     return  * (
     int  *) A-* (
     int  * 
    ) B;} qsort (Num,  
     100 , 
     sizeof  (Num [
     0 ]), CMP); 
     //  
     call the sorting function  
   

 

5. Input and Output

Enter a string with spaces

 
 CharCh [100]; Gets (CH );
 

 

Output Format

 
 IntA =12; Printf ("% 05d", );//Right alignment. The width is 5, which is not enough to be filled with 0. The output is 00012.Printf ("%-07d", );//Left alignment, 7 in width, not 0 fill, output: 1200000