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Input / Output - Programming

Q1:

To scan a and b given below, which of the following scanf() statement will you use? 
#include<stdio.h>

float a;
double b;

A scanf("%f %f", &a, &b);

B scanf("%Lf %Lf", &a, &b);

C scanf("%f %Lf", &a, &b);

D scanf("%f %lf", &a, &b);

ANS:A - scanf("%f %f", &a, &b);

To scan a float value, %f is used as format specifier. To scan a double value, %lf is used as format specifier. Therefore, the answer is scanf("%f %lf", &a, &b);