CODEWITHSUNDEEP
cfloating-pointstring-formattingformat-specifiers
atb
atb

Reputation: 963

Dynamic Float Format Specifier in C

Is there any way to have a user inputed float format specifier? For example, if I print this.

float c = 15.0123
printf("%.2f", c);

// outputs: 15.01

How can I assign the number of decimal places to a variable? Like:

int n = 3;
float c = 15.0123
printf("%.(%i)f", n, c);

// outputs: 15.012

Upvotes: 16

Views: 5740

Answers (2)

twain249
twain249

Reputation: 5706

printf("%.*f", n, c); that will print out c with n places after the decimal.

Upvotes: 7

ouah
ouah

Reputation: 145899

The precision can be specified by an argument with the asterisk *. This is called an argument-supplied precision.

float c = 15.0123;
int m = 2;
printf("%.*f", m,  c);

Upvotes: 28

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