Searching for string in char array of strings in C

问题:

char names [MAX_CLASS_SIZE][MAX_NAME_SIZE+1]={"Julias Hoffman","Dianne Conner","Mitchell Cooper","Johnnie Greene","Johanna Mason","Kevin Adkins","Brandi Spencer","Marian Tyler","Chester Cross","Martin Lawrence","Jane Smith","Sara Jones"};

char specificName[]="";

int search(char names[][MAX_NAME_SIZE+1],char specificName[])

for(i=0;i<MAX_CLASS_SIZE;i++){
    if (strcmp(names[i],specificName)==0)
    {
        printf("Found %s",names[i]);
        return i;
    }
}

This function receives an array of strings, called name and an array of characters that represents a specific name. This function searches through the array name for the specific name and returns the index of the specific name if it is found, -1 if it is not found.

Couldnt get the arrays to format properly my apologies. In main I ask the user for a name and store it in the specificName char array. Then in the search function I am attempting to search the array of names for the user given name and return a certain value based on if the name is found. I have included the necessary libraries. I am trying to do this using strcmp but it does not seem to work properly. Any help is greatly appreciated!

回答1:

You could try the following approach:

#include <stdio.h>
#include <stdlib.h>
#include<string.h>

int search(char **names,char *specificName, size_t length){
    size_t i,found=0;
    for(i=0;i<length;i++){
        if (strcmp(*(names + i),specificName)==0){
            found = 1;
        }
    }
    return found == 1 ? 0 : 1;
}


int main(void) {
    size_t length;
    char specificName[100];
    char *names[12]={"Julias Hoffman","Dianne Conner","Mitchell Cooper","Johnnie Greene",
                     "Johanna Mason","Kevin Adkins","Brandi Spencer","Marian Tyler",
                     "Chester Cross","Martin Lawrence","Jane Smith","Sara Jones"};

    length = sizeof names / sizeof *(names + 0);

    printf("Type a name to be searched:> ");
    if( fgets (specificName, 100, stdin) == NULL){
        printf("Error!\n");
    }

    specificName[strcspn(specificName, "\n")] = 0;

    if((search(names,specificName,length)) == 0){
        printf("Found %s",specificName);
    }else{
        printf("There was no Record Found.\n");
    }
    return 0;
}

Output:

Type a name to be searched:> Sara Jones
Found Sara Jones

回答2:

Took a quick look and it seems to work fine. Your i needs to be declared as an int but otherwise, the following works:

#include <stdio.h>
#include <stdlib.h>

#define MAX_CLASS_SIZE 100
#define MAX_NAME_SIZE 100

int strcmp(const char *, const char *);
int main(int argc, const char * argv[]) {

    char names [MAX_CLASS_SIZE][MAX_NAME_SIZE+1]={"Julias Hoffman","Dianne Conner","Mitchell Cooper","Johnnie Greene","Johanna Mason","Kevin Adkins","Brandi Spencer","Marian Tyler","Chester Cross","Martin Lawrence","Jane Smith","Sara Jones"};
    char specificName[]="Brandi Spencer";
    int search(char names[][MAX_NAME_SIZE+1],char specificName[]);
    for(int i=0;i<MAX_CLASS_SIZE;i++){
        if (strcmp(names[i],specificName)==0){
            printf("Found %s",names[i]);
            return i;
        }
    }

    return 0;
}

Output

Found Brandi Spencer

My guess would be is that you are not passing the user input correctly. Check specificName[] prior to strcmp().