multiplication to 10^log[10]N
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#include <stdio.h>
#include <math.h>
#include <float.h>
#include <stdlib.h>
#include <string.h>
int main(void) {
double S_log10=0;
char formula[500],value[500];
scanf("%s",formula);
printf("only '*' or Number\neach value's max:%lf\n%s\n",DBL_MAX,formula);
int l=0;
for(int i=0;formula[i]!='\0';i++){
if(formula[i]=='*'){
S_log10+=log10(strtod(value,NULL));
formula[0]='\0';
l=0;
}else{
value[l]=formula[i];
value[l+1]='\0';
l++;
}
}
S_log10+=log10(strtod(value,NULL));
printf("=10^%lf",S_log10);
return 0;
}
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