键盘手动输入字符串不限长度，如何定义字符数组将输入的字符串存入？并计算其长度？

[Web攻城狮]

键盘手动输入字符串不限长度，如何定义字符数组将输入的字符串存入？并计算其长度？

[一起来玩玩呗]

设置一个输入结束符

[Morrisss_]

std::string..

[zcdabing]

string s;
while(cin>>s)
{
 //....ctl+c结束
}

[爷就是这个范儿]

定义一个string类型的接受变量，strlen（）取长度。

[赵4老师]

malloc,realloc,free

[赵4老师]

对6楼代码的改进：

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define LEN 10
int main() {
    int i, length;
    char c;
    char *p,*tmp;

    length=LEN;
    p = (char *)malloc(sizeof(char) * length);
    if (NULL==p) return 1;
    i=0;
    while((c = getchar()) != '\n') {
            p[i++] = c;
            getchar();
            if (i == length){
                    length += LEN;
                    tmp = (char *)realloc((void *)p,sizeof(char) *length);
                    if (NULL==tmp) {free(p);return 1;}
                    p = tmp;
            }
    }
    p[i]=0;
    printf("string length = %d\n", i);
    printf("context is:%s\n", p);
    return 0;
}

[赵4老师]

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define LEN 10
int main() {
    int i, length;
    char c;
    char *p,*tmp;

    length=LEN;
    p = (char *)malloc(sizeof(char) * length);
    if (NULL==p) return 1;
    i=0;
    while((c = getchar()) != '\n') {
            p[i++] = c;
            getchar();
            if (i == length){
                    length += LEN;
                    tmp = (char *)realloc((void *)p,sizeof(char) *length);
                    if (NULL==tmp) {free(p);return 1;}
                    p = tmp;
            }
    }
    p[i]=0;
    printf("string length = %d\n", i);
    printf("context is:%s\n", p);
    free(p);
    return 0;
}

[chenxue0821]

#include <stdio.h>                                                                                                               
                                                                                                                                 
#define len 10                                                                                                                   
int main(int argc, char **argv){                                                                                                 
        int i = 0, length = len;                                                                                                 
        char c;                                                                                                                  
        char *p = (char *)malloc(sizeof(char) * length);                                                                         
        memset(p, 0, length);                                                                                                    
        while((c = getchar()) != '\n'){                                                                                          
                p[i++] = c;                                                                                                      
                getchar();                                                                                                       
                if(i == length){                                                                                                 
                        length += len;             
                        char * tmp = (char *)malloc(sizeof(char) *length);
                        memset(tmp, 0, length);                                                                                  
                        memcpy(tmp, p, length - len);                                                                            
                        free(p);                                                                                                 
                        p = tmp;                                                                                                 
                }                                                                                                                
        }                                                                                                                        
        printf("string length = %d\n", i);                                                                                       
        printf("context is:%s\n", p);                                                                                            
        return 1;                                                                                                                
}                                                                                                                                

[buyong]

std::string::size