need help with problem

[kingpin]

Create a function
int position(char * s, char c)
which takes a string parameter s and a char parameter c and returns
i. the first position in s which is equal to c
ii. -1 if c does not appear in s at all
for example
position("hello world",'w') will return 6
position("hello world",'z') will return -1

Create test5.c to test the function position. The main() function in test5 should


i. use gets() to read in a string
ii. print out the first position of each of the characters a, e, i, o and u in the string


Greatful for any help offered.

[kingpin]

#include <stdio.h>


int position(char s, char c)
{
int i;
int j;
int pos;

pos = -1;

for(i = 0; pos == -1 && s[i] != '\0'; i++)
{
for(j = 0; pos == -1 && c[j] != '\0'; j++)
{
if(c[j] == s[i])
{
pos = i;
}
}
}

return pos;
}


Heres a function ive tried to use as a basis of the program, i know how to get and read a string but i dont know how to combine it with the above function so i can find positions of vowels in a string.

[Dave_Sinkula]

From the prototype to the code, you lost the pointer declaration for s. And c is a single char, not a string, so there is no reason for the second loop.

int position(char *s, char c)
{
    int i;
    for ( i = 0; s[i] != '\0'; i++ )
    {
        if ( c == s[i] )
        {
            return i;
        }
    }
    return -1;
}

>i. use gets() to read in a string
In the future, avoid gets.