[c/cpp]：字符计数和文本行计数

[c/cpp]：字符计数和文本行计数

 

 

 

 

一、代码

#include <iostream>
#include <string>
#include <vector>


char input[] = "1\n2\n3\n";


// string_length = string_real_length + '\0'.
// charstring_length = cslen
int cslen(char *p){
    
    char end='\0';
    int size ;
    
    // init 'size'
    if(*p==end) { 
        size = 0;
    } else { 
        size=1;
    }

    for(char *c=p; *c!=end; c++) {
        size += 1;
    }

    //std::cout << "\t[str_len]#\t" << size << std::endl;    
    return size;
}


// return numbers of line. line, end with '\n'.
// line seperated by '\n'
int line_no(char *p)
{
    char *c=p;
    char line_end = '\n';
    char char_end = '\0';
    
    int line_num = 0;
    
    for ( ; *c!=char_end; c++) {
        //std::cout << "\t[test]#\t" << *c << std::endl;
        if ( *c==line_end ) {
            line_num += 1;
        }
    }


    //std::cout <<"\t[line_no]#\t" << line_num << std::endl;
    return line_num;
}


// test part
int main()
{
    std::cout << "\t[string]#\t" << input << std::endl;
    
    std::cout << "\t[str_len]#\t" << cslen(input) << std::endl;
    std::cout << "\t[line_no]#\t" << line_no(input) << std::endl;
    
    return 0 ;
}

 

 

 

二、运行结果

	[string]#	1
2
3

	[str_len]#	7
	[line_no]#	3

 

 

 

三、参考资料和工具

 

　　1、　　cpp在线编辑工具　　-　　https://coliru.stacked-crooked.com/