View difference between Paste ID: yCZwezRN and KMe7vaJ2

 #include <stdbool.h>
 #include <string.h>
 [...]
 bool substituirVogaisPorEspaco(char *string){
 	char vogais[]="aeiouAEIOU";
 
 	bool substituiu, tmp;
 
-		for( int j=0; j<strlen(vogais); j++){
+	for( int i=0; i<strlen(vogais); i++){
-			if(string[i] == vogais[j]){
+		tmp = substituirCaractere(string, vogais[i], ' ');
-				string[i] = ' ';
+		if(tmp){
 			substituiu = tmp;
 		}
 	}
 
 	return substituiu;
 }
 
 bool substituirNumerosPorLetras(char *string){
 	char numeros[]="0123456789";
 
 	bool substituiu, tmp;
 
 	for( int i=0; i<strlen(numeros); i++){
-		for( int j=0; j<strlen(numeros); j++){
+		tmp = substituirCaractere(string, numeros[i], 'A');
-			if(string[i] == numeros[j]){
+		if(tmp){
-				string[i] = 'A';
+			substituiu = tmp;
 		}
 	}
 
 	return substituiu;
 }
 
 bool substituirCaractere(char *string, char antigoCaractere, char novoCaractere){
 	bool substituiu = false;
 
 	for( int i=0; i<strlen(string); i++){
 			if(string[i] == antigoCaractere){
 				string[i] = novoCaractere;
 				substituiu = true;
 			}
 		}
 	}
 
 	return substituiu;
 }
 
 [...]