Autor: Algoritmo Nota 10 | Publicado: 2011-05-07T09:14:00-07:00

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Saída formatada: printf()
Biblioteca: stdio.h
Declaração: int printf (const char* st_contr [, lista_arg]);Propósito: A função printf() (print formated) imprime dados da lista de argumentoslista_arg formatados de acordo com a string de controle st_contr. Esta função retorna um valor inteiro representando o número de caracteres impressos.Esta função imprime dados numéricos, caracteres e strings. Esta função é dita de saída formatada pois os dados de saída podem ser formatados (alinhados, com número de dígitos variáveis, etc.).
Sintaxe: A string de controle é uma máscara que especifica (formata) o que será impresso e de que maneira será impresso.
Exemplo: Observe no exemplo abaixo as instruções de saída formatada e os respectivos resultados. Admita que idade seja uma variável int contendo o valor 29 e que tot e din sejam variáveis float cujo valores são, respectivamente, 12.3 e 15.0.
Instrução:printf(“Tenho %d anos de vida”,idade);Saída:Tenho 29 anos de vida
Instrução:printf(“Total: %f.2 \nDinheiro: %f.2 \nTroco: %f.2“,tot,din,din-tot);Saída:Total: 12.30Dinheiro: 15.00Troco: 2.70