删除c字符串中的字符

Question

如何从c中的字符串中删除特定字符？

例如：如果字符串为“ABCD” 我需要删除索引1 的角色，那么结果应该是，“ACD”

我尝试：

void removeSymbol(char *line){ 
    int i,j; char c; 
    for(i=0;i<strlen(line);i++){ 
     c = *(line +i); 
     if(!(isdigit(c)||isalpha(c))){ strcpy((line+i),(line+i+1)); } 
    } 
    printf("%s\n",line); 
} 

Answer 1

我已经改变removeSymbol API的原型。我希望这下面的代码将满足您的要求

void removeSymbol(char *line, int index) 
{ 
    //Added as per comments 
    if ((index > 0) && (index <= strlen (line))) 
    { 

     //index-> index which needs to be removed. 
     // +1 is added in memmove last argument to move '\0' character also 

     memmove (&line[index-1], line + index, strlen (line)-index +1); 
    } 

} 

int main(void){ 

    char symbol [] = "abcdefgh"; 
    removeSymbol (symbol, 8); 
    printf ("%s\n", symbol); 
} 

Answer 2

#include <stdio.h> 
#include <string.h> 
void removSymbol(char *,int); 
main() 
{ 
    int index=1; 
    removSymbol("abcd",index); 
} 
void removSymbol(char *line,int index) 
{ 
    int i; 
    for(i=0;i<strlen(line)-1;i++) 
    { 
     if(i<index) 
     { 
      *(line+i) = *(line +i); 
     } 
     else 
     { 
      *(line+i) = *(line+i+1); 
     } 

    } 
    *(line+i+1)='\0'; 
    printf("%s\n",line); 
} 

Answer 3

static inline void removeSymbol(char *line, size_t index){ 
    memmove(&line[index], &line[index+1], strlen(&line[index])); 
    //printf("%s\n",line); 
}