Control of input and output formats in C language

Control of formatted output

#include <stdio.h>


int main (void) {
float a=111123.681111f;
printf ("%1.3f", a);
return 0;
}

Results: 111123.680

So 1.3 is only for the fractional part.

Format input

#include <stdio.h>


int main (void) {
int a=0;
scanf ("%8d\n", &a);
printf ("%1d\n", a);
return 0;
}

Input: 2222222222222222222222

Output: 22222222

So the width limit of the input affects the width of the output, regardless of the width limit of the output.

Control of input and output formats in C language