how can i prove a string does not contain a number ?
how can i prove a string does not contain a number ?
for example,
string s1="1-23" // there is a negative sign inside....so s1 does not hold number
string s2 = "12 " // this also does not contain a number as ther is a space at last
string s3 = "123"; // this holds a number
for this example string s1,s2 does not contain a number but string s3 contain a number (i.e 123).
how can i prove ?
atoi() function wont be helpful in this case bcoz they dont care delimeters.
however how can solve this ?