Could you help me use the atof function? My code is giving "access violation" on the line in which I am using atof, I already tried to change the type of array "given" for both int and float
int main() {
char pilha[10];
int i;
int dado[10];
int topo = 0;
printf("Informe a expressao\n");
gets(pilha);
fflush(stdin);
for (i = 0; i < strlen(pilha); i++)
{
if (isdigit(pilha[i]))
{
dado[topo] = atof(pilha[i]);
topo++;
}
}
The atof function is used to convert a string to a double. Strings in C end with '\ 0' and when you do atof (stack [i]) the program does not find '\ 0', which would indicate that it is a string, and generates this error, see in the signature of the function: double atof (const char * str); Use the strtok () function to separate your stack variable into multiple strings according to a separation pattern, the function's signature is: char * strtok (char * str, const char * delim), where char * str is the string you want separate and const char * delim is the string that has what will be used to do this separation. Example usage:
#include <string.h>
#include <stdio.h>
int main(){
char str[80] = "Isto eh - um - teste";
char s[2] = "-";
char *token;
/* pega o primeiro token */
token = strtok(str, s);
/* caminha através de outros tokens */
while( token != NULL ){
printf( " %s\n", token );
token = strtok(NULL, s);
}
return(0);
}