Search/print specific elements in array - c

Question

Anyone know how to search (with luck) for specific elements in an array? I'v tried about everything - except the correct way.
My two corresponding char-arrays looks something like this:
char array1[10][10]={"Alpha","Bravo","Charlie","Delta","Alpha2"}; //room for some more here
char array2[10][10]={"123456","234567","345678","456789","567890"}; //room for some more here
I can print them all by the regular for-loop:
for (i=0;i<10;i++){
printf("%s %s \n", &array1[i], &array2[i]);
}
But let's say I want do the same loop, and only print the two elements starting with 'A' (the first and last one). I thought something like this would work
do {
for (i=0;i<10;i++){
printf("Name: %s\nDate: %s\n\n", &array1[i][x], &array2[i]);
}
} while (x=='A');
That's the same for-loop, except I put the extra [x] behind &array1 to tell my 'x' have to match the first character in each element of array1 (like it will only do the for loop while (x=='A') - which is the first letter in the elements I want.
But it doesn't do any good..
Anyone have a better solution? I've tried other variants of the for loop also, without luck. I'm just stuck now...

Answer 1

#include <stdio.h>
int main(void) {
char array1[10][10]={"Alpha","Bravo","Charlie","Delta","Alpha2"}; //room for some more here
char array2[10][10]={"123456","234567","345678","456789","567890"}; //room for some more here
int i;
for (i=0;i<10;i++){
if(array1[i][0]=='A') //add this statement in your code
printf("%s %s \n", &array1[i], &array2[i]);
}
return 0;
}

Answer 2

using while you are checking x=='A' it will compare with the ASCII value of A. The condition is wrong.
you can use
while((strncmp(array,"A",1)) == 0)
this will check the first character of the string.

Answer 3

except I put the extra [x] behind &array1 to tell my 'x' have to match the first character in each element of array1
That's not quite how array subscripts work. As you have found, array1[i] will refer to the ith string in array1. You can then access the xth character in array1[i] by indexing into the string, i.e. array1[i][x].
You don't actually assign x anywhere, so you'll end up with undefined behaviour. What you want to do is extract the first character of array1[i] (i.e. element zero), so the following is possible:
char x = '\0';
do {
for (i=0;i<10;i++){
x = array1[i][0];
printf("Name: %s\nDate: %s\n\n", &array1[i][x], &array2[i]);
}
} while (x=='A');
You'll then notice that this probably doesn't give the behaviour you want. It'll loop over all 10 strings, then perform the x == 'A' check. You should move that inside the loop instead, e.g.
char x = '\0';
for(i = 0; i < 10; i++)
{
x = array1[i][0];
if(x == 'A')
printf("%s %s \n", &array1[i], &array2[i]);
}