int AscToInt(const char *num){
int no;
no = 0;
while(*num != 0){
if(*num >= '0' && *num <= '9'){
no = no*10+ (*num-48); // 48 == '0'
num++; // to the next address of the character(the number)
}
else{
cout<<"num is not NUMBER"<<endl;
return 0;
}
}
return no;
}
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after i read other's code, i realized that this code doesn't work for negative.
so,
int AscToInt(const char *num){
int no;
int i;
no = 0;
for(i=0;num[i]!=0;i++){
if(num[i] == '-'){
continue;
}
else if(num[i] >= '0' && num[i] <= '9'){
no = no*10+ (num[i]-48);
}
else{
cout<<"num is not NUMBER"<<endl;
return 0;
}
}
if(num[0] == '-')
return (-1)*no;
else
return no;
}