I am trying to find out if there is an alternative way of converting string to integer in C.
I regularly pattern the following in my code.
char s[] =
You can always roll your own!
#include
#include
#include
int my_atoi(const char* snum)
{
int idx, strIdx = 0, accum = 0, numIsNeg = 0;
const unsigned int NUMLEN = (int)strlen(snum);
/* Check if negative number and flag it. */
if(snum[0] == 0x2d)
numIsNeg = 1;
for(idx = NUMLEN - 1; idx >= 0; idx--)
{
/* Only process numbers from 0 through 9. */
if(snum[strIdx] >= 0x30 && snum[strIdx] <= 0x39)
accum += (snum[strIdx] - 0x30) * pow(10, idx);
strIdx++;
}
/* Check flag to see if originally passed -ve number and convert result if so. */
if(!numIsNeg)
return accum;
else
return accum * -1;
}
int main()
{
/* Tests... */
printf("Returned number is: %d\n", my_atoi("34574"));
printf("Returned number is: %d\n", my_atoi("-23"));
return 0;
}
This will do what you want without clutter.